12th Class Biology Molecular basis of Inheritance / विरासत का आणविक आधार Question Bank

done MCQs - Molecular Basis of Inheritance Total Questions - 245

• question_answer1)
  Sexual reproduction in which DNA of bacteria is transferred to another by the help of bacteriophage is
  A)
  Transformation done clear
  B)
  Transduction done clear
  C)
  Transcription done clear
  D)
  Configuration done clear
  View Solution play_arrow

• question_answer2)
  The transfer of genetic material from one bacterium to another by virus is called
  A)
  Transduction done clear
  B)
  Translation done clear
  C)
  Conjugation done clear
  D)
  Transformation done clear
  View Solution play_arrow

• question_answer3)
  One of these is not prepared directly from DNA
  A)
  Another DNA done clear
  B)
  mRNA done clear
  C)
  Protein done clear
  D)
  tRNA done clear
  View Solution play_arrow

• question_answer4)
  What happened when heat killed S cells along with live R cells were injected into mice?
  A)
  Mice survived and showed live S cells done clear
  B)
  Mice died and showed, S cells done clear
  C)
  Mice survived and showed live R cells done clear
  D)
  Mice died and showed dead S cells done clear
  View Solution play_arrow

• question_answer5)
  Reverse transcription is
  A)
  DNA synthesized from RNA done clear
  B)
  RNA synthesized from DNA done clear
  C)
  DNA synthesized from 3' to 5' end done clear
  D)
  DNA synthesized from 5' to 3' end done clear
  View Solution play_arrow

• question_answer6)
  Unwinding of DNA is done by
  A)
  Topoisomerase done clear
  B)
  Exonuclease done clear
  C)
  Helicase done clear
  D)
  Telophase done clear
  View Solution play_arrow

• question_answer7)

  What is shown in the following figure?

  A)
  One Polynucleotide chains done clear
  B)
  Two Polynucleotide chains done clear
  C)
  Three Polynucleotide chains done clear
  D)
  Four Polynucleotide chains done clear
  View Solution play_arrow

• question_answer8)
  DNA helix model was given by
  A)
  Watson and Crick done clear
  B)
  Knoll and Ruska done clear
  C)
  Khorana done clear
  D)
  Priestley done clear
  View Solution play_arrow

• question_answer9)
  During the replication of a bacterial chromosome, DNA synthesis starts from the replication origin site and
  A)
  Moves in bi-directional way done clear
  B)
  RNA primers are in involved done clear
  C)
  Is facilitated by telomerase done clear
  D)
  Moves in one direction of site done clear
  View Solution play_arrow

• question_answer10)
  DNA repair is carried out by
  A)
  DNA ligase done clear
  B)
  DNA polymerase done clear
  C)
  DNA polymerase II done clear
  D)
  DNA polymerase I done clear
  View Solution play_arrow

• question_answer11)
  A double stranded DNA having 100,000 bp will have a length of
  A)
  10,000 nm done clear
  B)
  101 nm done clear
  C)
  \[3.4\times {{10}^{4}}\,nm\] done clear
  D)
  200,000 nm done clear
  View Solution play_arrow

• question_answer12)
  Which one of the following correctly represents the manner of replication of DNA?
  A)
  done clear
  B)
  done clear
  C)
  done clear
  D)
  done clear
  View Solution play_arrow

• question_answer13)
  The total number of nitrogenous bases in human genome is estimated to be about
  A)
  3.5 million done clear
  B)
  35 thousand done clear
  C)
  35 million done clear
  D)
  3.1 billion done clear
  View Solution play_arrow

• question_answer14)
  DNA repairing is done by
  A)
  Ligase done clear
  B)
  DNA polymerase I done clear
  C)
  DNA polymerase II done clear
  D)
  Both [a] and [b] done clear
  View Solution play_arrow

• question_answer15)
  A ribotide or ribonucleotide is made up of
  A)
  Adenine + Deoxyribose + Phosphate done clear
  B)
  Uracil + Ribose + Phosphate done clear
  C)
  Thymine = Ribose + Phosphate done clear
  D)
  Uracil + Deoxyribose + Phosphate done clear
  View Solution play_arrow

• question_answer16)
  The double helix model of Watson and Crick is known as :
  A)
  C DNA done clear
  B)
  Z DNA done clear
  C)
  D DNA done clear
  D)
  B DNA done clear
  View Solution play_arrow

• question_answer17)
  Viral genome incorporated and integrated with bacterial genome is referred to as :
  A)
  Prophage done clear
  B)
  RNA done clear
  C)
  DNA done clear
  D)
  Both [b] and [c] done clear
  View Solution play_arrow

• question_answer18)
  DNA fragments are joined in a correct sequence by
  A)
  DNA polymerase I done clear
  B)
  DNA ligase done clear
  C)
  RNA polymerase done clear
  D)
  Helicase done clear
  View Solution play_arrow

• question_answer19)
  Which one of the following is correctly matched?
  A)
  Frederick Griffith - Discovered the phenomenon of transformation done clear
  B)
  Linus Pauling - Isolated DNA for the first time done clear
  C)
  Francis Crick - Proposed one gene one polypeptide hypothesis done clear
  D)
  George Beadle - Proposed concept of inborn errors done clear
  View Solution play_arrow

• question_answer20)
  A nucleosome is a portion of the chromonema or chromotene containing:
  A)
  Only histones done clear
  B)
  Both DNA and histones done clear
  C)
  Only DNA done clear
  D)
  Both DNA and RNA done clear
  View Solution play_arrow

• question_answer21)
  DNA is methylated at :
  A)
  A-residue done clear
  B)
  G-residue done clear
  C)
  T-residue done clear
  D)
  C-residue done clear
  View Solution play_arrow

• question_answer22)
  Degeneration of DNA after heating can be studied by comparing :
  A)
  A : T ratio done clear
  B)
  G : C ratio done clear
  C)
  Sugar : Phosphate ratio done clear
  D)
  Number of nucleotides done clear
  View Solution play_arrow

• question_answer23)
  DNA in eukaryotes is a double helix and:
  A)
  Complementary and parallel done clear
  B)
  Complementary and antiparallel done clear
  C)
  Without supercoils done clear
  D)
  Always circular done clear
  View Solution play_arrow

• question_answer24)
  DNA multiplication is called :
  A)
  Translation done clear
  B)
  Replication done clear
  C)
  Transduction done clear
  D)
  Transcription done clear
  View Solution play_arrow

• question_answer25)
  DNA length per turn of helix is :
  A)
  3.8 A done clear
  B)
  3.4 A done clear
  C)
  6.8 A done clear
  D)
  34 A done clear
  View Solution play_arrow

• question_answer26)
  The following ratio is generally constant for a given species :
  A)
  A+G/C+T done clear
  B)
  T+C/G+A done clear
  C)
  G+C/A+T done clear
  D)
  A+C/T+G done clear
  View Solution play_arrow

• question_answer27)
  RNA and DNA are similar in :
  A)
  Having similar sugars done clear
  B)
  Having similar pyrimidine bases done clear
  C)
  Being capable to replicate done clear
  D)
  Being polymers of nucleotide done clear
  View Solution play_arrow

• question_answer28)

  What is shown in the following figure?

  A)
  Single stranded polynucleotide chain done clear
  B)
  Double stranded polynucleoside chain done clear
  C)
  One stranded polynucleoside chain done clear
  D)
  Double stranded polynucleotide chain done clear
  View Solution play_arrow

• question_answer29)
  Which one of the following makes use of RNA as a template to synthesize DNA?
  A)
  Reverse transcriptase done clear
  B)
  DNA dependent RNA polymerase done clear
  C)
  DNA polymerase done clear
  D)
  RNA polymerase done clear
  View Solution play_arrow

• question_answer30)
  Which of the following first suggest the conservative model of DNA replication?
  A)
  Cairns done clear
  B)
  Messelson and Stahl done clear
  C)
  Watson and Crick done clear
  D)
  Taylor done clear
  View Solution play_arrow

• question_answer31)
  Genetic material of retrovirus is :
  A)
  DNA done clear
  B)
  RNA done clear
  C)
  Both [a] and [b] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer32)
  E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes Then it was made to replicate in a normal medium. Which of the following observation will be correct
  A)
  Both the strands of DNA will be radioactive done clear
  B)
  One strand radioactive done clear
  C)
  Each strand half radioactive done clear
  D)
  None is radioactive done clear
  View Solution play_arrow

• question_answer33)
  How many base pairs are present in B - DNA?
  A)
  12 done clear
  B)
  11 done clear
  C)
  10 done clear
  D)
  9 done clear
  View Solution play_arrow

• question_answer34)
  Isoiopes used for proving semiconservative replication of DNA are
  A)
  \[{{N}^{14}}\]and \[{{P}^{31}}\] done clear
  B)
  \[{{N}^{14}}\]and \[{{N}^{15}}\] done clear
  C)
  \[{{N}^{14}}\]and \[{{C}^{14}}\] done clear
  D)
  \[{{C}^{14}}\] and\[{{P}^{31}}\] done clear
  View Solution play_arrow

• question_answer35)
  Z - DNA in eukaryotes is
  A)
  Right handed and has about 12 bases per turn done clear
  B)
  Left handed and has about 12 bases per turn done clear
  C)
  Right handed and has about 10 bases per turn done clear
  D)
  Left handed and has about 10 bases per turn done clear
  View Solution play_arrow

• question_answer36)

  Consider the parts labelled in 1 and 2 respectively in the following diagram of DNA double helix and find out the correct sequences :

  A)
  1 - Base pairs; 2 - Sugar phosphate backbone done clear
  B)
  1 - Base pairs; 2 - Sugar adenine phosphate backbone done clear
  C)
  1 - Base pairs; 2 - Sugar thymine phosphate backbone done clear
  D)
  1 - Base pairs; 2 - Sugar uracil phosphate backbone done clear
  View Solution play_arrow

• question_answer37)
  Nucleotide arrangement in DNA can be seen by:
  A)
  X-ray crystallograp done clear
  B)
  Electron microscope done clear
  C)
  Ultra centrifuge done clear
  D)
  Transcriptase done clear
  View Solution play_arrow

• question_answer38)
  Which particular process was used by Meselson and Franklin in order to study the semi-conservatireplication of DNA:
  A)
  Centrifugation done clear
  B)
  Chromatography done clear
  C)
  Density gradient centrifugation done clear
  D)
  Buoyant density centrifugation done clear
  View Solution play_arrow

• question_answer39)
  DNA was first discovered by :
  A)
  J.D. Watson done clear
  B)
  Francis Crick done clear
  C)
  Friedrich-Miescher done clear
  D)
  H.G. Khurana done clear
  View Solution play_arrow

• question_answer40)
  Which of the following is purely inactive?
  A)
  Euchromatin done clear
  B)
  Heterochromatin done clear
  C)
  Both [a] and [b] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer41)
  DNA replication includes:
  A)
  DNA ligase done clear
  B)
  DNA polymerase and ligase done clear
  C)
  RNA polymeras done clear
  D)
  All of the above done clear
  View Solution play_arrow

• question_answer42)
  During DNA replication in prokaryotes DNA is anchored to:
  A)
  Chromosome done clear
  B)
  Mesosome done clear
  C)
  Nucleolus done clear
  D)
  Ribosome done clear
  View Solution play_arrow

• question_answer43)
  Stain used by Feulgen to stain DNA is :
  A)
  Janus green done clear
  B)
  Basic fuschin done clear
  C)
  Crystal violet done clear
  D)
  Methylene blue done clear
  View Solution play_arrow

• question_answer44)
  In microbial genetics which one is referred to as 'Griffith Effect'?
  A)
  Conjugation done clear
  B)
  Transduction done clear
  C)
  Transformation done clear
  D)
  Sexudation done clear
  View Solution play_arrow

• question_answer45)
  If percentage of cytosine is 18%, then percentage of adenine will be :
  A)
  32% done clear
  B)
  64% done clear
  C)
  36% done clear
  D)
  23% done clear
  View Solution play_arrow

• question_answer46)
  DNA nucleotides are attached by
  A)
  Hydrogen bond done clear
  B)
  Covalent bond done clear
  C)
  Vander Waals bond done clear
  D)
  Electrovalent bond done clear
  View Solution play_arrow

• question_answer47)

  Consider the parts labelled in 1, 2, 3 and 4 respectively in the following diagram of Nucleosome and find out the correct sequences:

  A)
  1 - DNA; 2 - H2 histone; 3 - Histone octamer; 4 - Core of histone molecules done clear
  B)
  1 - DNA; 2 - H3 histone; 3 - Histone octamer; 4 - Core of histone molecules done clear
  C)
  1 - DNA; 2 - H4 histone; 3 - Histone octamer; 4 - Core of histone molecules done clear
  D)
  1 - DNA; 2 - H1 histone; 3 - Histone octamer; 4 - Core of histone molecules done clear
  View Solution play_arrow

• question_answer48)
  Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a triplet?
  A)
  Nirenberg and Mathae done clear
  B)
  Hershey and Chase done clear
  C)
  Morgan and Sturtevant done clear
  D)
  Beadle and Tatum done clear
  View Solution play_arrow

• question_answer49)
  The coding segment of eukaryotic DNA is :
  A)
  Exon done clear
  B)
  Replicon done clear
  C)
  Intron done clear
  D)
  Muton done clear
  View Solution play_arrow

• question_answer50)
  Okazaki is known for his contribution to the understanding of :
  A)
  Transcription done clear
  B)
  Translation done clear
  C)
  DNA replication done clear
  D)
  Mutation done clear
  View Solution play_arrow

• question_answer51)
  The beginning of understanding genetic transformation in bacteria was made'-
  A)
  Frederick Griffith done clear
  B)
  Hershey and Chase done clear
  C)
  Watson and Crick done clear
  D)
  T.H. Morgan done clear
  View Solution play_arrow

• question_answer52)
  DNA gyrase, the enzyme that participates in the process of DNA replication is a type of :
  A)
  DNA topoisomerase done clear
  B)
  Reverse transcriptase done clear
  C)
  DNA ligase done clear
  D)
  DNA polymerase done clear
  View Solution play_arrow

• question_answer53)

  Compare the statements A and B.

  Statement A: Synthesis of DNA takes place in the S-phase of interphase.

  Statement B: Every chromosome, during metaphase, has two chromatids and one centromere.

  Choose the correct description :

  A)
  Statement A is wrong and B is correct done clear
  B)
  Statement A is correct and B is wrong done clear
  C)
  Both the statements A and B are correct and A is the reason for B done clear
  D)
  Both the statements A and B are correct and A is not the reason for B. done clear
  View Solution play_arrow

• question_answer54)
  The process of copying genetic information from one strand of the DNA into RNA is termed as :
  A)
  Translation done clear
  B)
  Transamination done clear
  C)
  Replication done clear
  D)
  Transcription done clear
  View Solution play_arrow

• question_answer55)
  During Meselson and Stahl's experiments, heavy DNA was distinguished from normal DNA by centrifugation in
  A)
  CsOH gradient done clear
  B)
  \[^{14}N{{H}_{4}}Cl\] done clear
  C)
  \[^{15}N{{H}_{4}}Cl\] done clear
  D)
  CsCl done clear
  View Solution play_arrow

• question_answer56)
  A typical nucleosome gradient in eukaryotic cell contains:
  A)
  100 bp of DNA helix done clear
  B)
  200 bp of DNA helix done clear
  C)
  300 bp of DNA helix done clear
  D)
  400 bp of DNA helix done clear
  View Solution play_arrow

• question_answer57)
  A mixture containing DNA fragments, A, B C and D with molecular weights of A+B=C, \[A>B\] and \[D>C\], was subjected to agarose gel electrophoresis. The positions of these fragments from cathode to anode sides of the gel would be:
  A)
  B, A, C, D done clear
  B)
  A, B, C, D done clear
  C)
  C, B, A, D done clear
  D)
  B, A, D, C done clear
  View Solution play_arrow

• question_answer58)
  Which of the following DNA sequences qualifies to be designated as a palindrome?
  A)
  5' - GACCAG - 3' in one strand done clear
  B)
  3' - GACCAG - 5' in one strand done clear
  C)
  5' - GACCAG - 3' 3' - CTGGTC - 5' done clear
  D)
  5 - AGCGCT - 3' 3' - TCGCGA - 5' done clear
  View Solution play_arrow

• question_answer59)
  If the total amount of adenine and thymine in a double standard DNA is 45%, the amount of guanine in DNA will be:
  A)
  22.5% done clear
  B)
  27.5% done clear
  C)
  45% done clear
  D)
  55% done clear
  View Solution play_arrow

• question_answer60)
  Purines possess nitrogen at
  A)
  1, 2, 4 and 6 position done clear
  B)
  1, 3, 5 and 7 position done clear
  C)
  1, 3, 7 and 9 position done clear
  D)
  1, 2, 6 and 8 position done clear
  View Solution play_arrow

• question_answer61)
  In a DNA molecule distance between two bases is:
  A)
  \[2nm/20\overset{O}{\mathop{A}}\,\] done clear
  B)
  \[0.2nm/2\overset{O}{\mathop{A}}\,\] done clear
  C)
  \[3.4nm/34\overset{O}{\mathop{A}}\,\] done clear
  D)
  \[0.34nm/3.4\overset{O}{\mathop{A}}\,\] done clear
  View Solution play_arrow

• question_answer62)
  The enzyme needed in biological systems for joining two molecules is called:
  A)
  Lyases done clear
  B)
  Diastases done clear
  C)
  Polymerase done clear
  D)
  Hydrolase done clear
  View Solution play_arrow

• question_answer63)
  Which of the following is structural subunit of DNA?
  A)
  Protein done clear
  B)
  Carbohydrate done clear
  C)
  RNA done clear
  D)
  Nucleotides done clear
  View Solution play_arrow

• question_answer64)
  Nitrogenous base present in DNA:
  A)
  Adenine, guanine, cytosine, thymine done clear
  B)
  Adenine, guanine, cytosine, uracil done clear
  C)
  Adenine, thymine, uracil done clear
  D)
  Guanine, uracil done clear
  View Solution play_arrow

• question_answer65)

  What is shown in the following figure?

  A)
  Frederick Griffith - experiment done clear
  B)
  The Hershey - Chase experiment done clear
  C)
  Taylor - experiment done clear
  D)
  Avery MacLeod and Maclyn - experiment done clear
  View Solution play_arrow

• question_answer66)
  The Hershey - Chase experiment In polynucleotide chain, nucleoside formed through N-glycosidic linkage by joining 
  A)
  Phosphate group with Nitrogenous base done clear
  B)
  Nitrogenous base with Nitrogenous base done clear
  C)
  Nitrogenous base with Pentose sugar done clear
  D)
  Pentose sugar with Phosphate group done clear
  View Solution play_arrow

• question_answer67)
  The enzyme responsible for reverse transcription is:
  A)
  RNA polymerase done clear
  B)
  DNA polymerase done clear
  C)
  Reverse transcriptase done clear
  D)
  Transcriptase done clear
  View Solution play_arrow

• question_answer68)
  The central dogma of protein synthesis is :
  A)
  Protein \[\to RNA\to DNA\] done clear
  B)
  Protein\[\to DNA\to RNA\] done clear
  C)
  \[RNA\to DNA\to \Pr otein\] done clear
  D)
  \[DNA\to RNA\to \Pr otein\] done clear
  View Solution play_arrow

• question_answer69)

  What is shown in the following figure?

  A)
  The Hershey - Chase experiment done clear
  B)
  Taylor - experiment done clear
  C)
  Avery MacLeod and Maclyn -experiment done clear
  D)
  Meselson and Stahl's Experiment done clear
  View Solution play_arrow

• question_answer70)
  A - DNA is
  A)
  left handed helix with 12 nucleotide pairs per turn done clear
  B)
  right handed helix with 11 nucleotide pairs per turn done clear
  C)
  right handed helix with 12 nucleotide pairs per turn done clear
  D)
  left handed helix with 11 nucleotide pairs per turn done clear
  View Solution play_arrow

• question_answer71)

  Read the following statements and choose the correct option

  [A] Nitrogenous base is linked to the pentose sugar through a N-glycosidic linkage.

  [B] Phosphate group is linked to 5' - OH of a nucleoside through phosphoester linkage

  [C] Two nucleosides are linked through 3' - 5' N-glycosidic linkage

  [D] Negatively charged DNA is wrapped around positively charged histone octamer to form nucleosome

  [E] The chromatin that is more densely packed and stains dark is called euchromatin

  A)
  A, B and C alone are wrong done clear
  B)
  D alone is wrong done clear
  C)
  C and E alone are wrong done clear
  D)
  A alone is wrong done clear
  View Solution play_arrow

• question_answer72)
  Match the column I with column II and choose the correct option

  	Column - I		Column - II
  [a]	Incomplete dominance	(i)	Hershey and Chase
  [b]	Linkage	(ii)	Antitrhinum sp.
  [c]	Transforming principle	(iii)	Griffith
  [d]	Proved that DNA is the genetic material	(iv)	Morgan

  A)
  A-i; B-iv; C-iii; D-ii done clear
  B)
  A-iv; B-ii; C-iii; D-i done clear
  C)
  A-ii; B-iii; C-iv; D-i done clear
  D)
  A-ii; B-iv; C-iii; D-i done clear
  View Solution play_arrow

• question_answer73)
  The enzyme required to catalyze the polymerization of deoxynucleotide is
  A)
  DNA ligase done clear
  B)
  DNA polymerase done clear
  C)
  P-galactosidase done clear
  D)
  transacetylase done clear
  View Solution play_arrow

• question_answer74)
  Okazaki fragments during the formation of lagging strand are
  A)
  large DNA segments having promoter, initiation, coding and terminator regions done clear
  B)
  short segments of replicated DNA formed from DNA template with polarity \[5'\to 3'\] done clear
  C)
  additional nucleotides added to the ends of RNA done clear
  D)
  short segments of wrong bases introduced during replication done clear
  View Solution play_arrow

• question_answer75)
  Number of histone proteins in each nucleosome core is
  A)
  8 done clear
  B)
  10 done clear
  C)
  12 done clear
  D)
  14 done clear
  View Solution play_arrow

• question_answer76)
  DNA parts which can switch their positions are
  A)
  cistrons done clear
  B)
  transposons done clear
  C)
  introns done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer77)
  DNAase is
  A)
  a hormone done clear
  B)
  an enzyme done clear
  C)
  a catalyst done clear
  D)
  a carbohydrate done clear
  View Solution play_arrow

• question_answer78)
  Which is the first evolved genetical material on this earth
  A)
  mRNA done clear
  B)
  tRNA done clear
  C)
  rRNA done clear
  D)
  DNA done clear
  View Solution play_arrow

• question_answer79)
  The double helix of DNA is made of polynucleotide chains wherein backbone constituted by sugar- phosphate and the bases projected
  A)
  inside done clear
  B)
  outside done clear
  C)
  one base inside and the other outside done clear
  D)
  bases remain in line of sugar-phosphate. done clear
  View Solution play_arrow

• question_answer80)
  In eukaryotic genes, coding sequences are called
  A)
  introns done clear
  B)
  exons done clear
  C)
  regulatory sequence done clear
  D)
  repetitive DNA done clear
  View Solution play_arrow

• question_answer81)
  If the sequence of bases in the coding strand of a double stranded DNA is 5'-GTTCGAGTC-3', the sequence of bases in its transcript will be
  A)
  5'-GACUCGAAC-3' done clear
  B)
  5'-CAAGCUCAG-3' done clear
  C)
  5'-GUUCGUGUC-3' done clear
  D)
  5'-CUGAGCUUG-3' done clear
  View Solution play_arrow

• question_answer82)
  The structure of E. coli chromosomal DNA is
  A)
  double stranded, right, handed and circular done clear
  B)
  single stranded, right handed and circular done clear
  C)
  double stranded, left handed and linear done clear
  D)
  double stranded, left handed and circular done clear
  View Solution play_arrow

• question_answer83)
  Who gave semi-conservative mode of DNA replication for the first time in E. coli with the help of 15N heavy nitrogen isotope?
  A)
  Watson and Crick done clear
  B)
  Kornberg and Ochoa done clear
  C)
  Meselson and Stahl done clear
  D)
  Luria and Delbruck done clear
  View Solution play_arrow

• question_answer84)
  What will be the number of histone molecules in a chromatin fibre of a eukaryotic cell having 50 nucleosomes?
  A)
  400 done clear
  B)
  450 done clear
  C)
  500 done clear
  D)
  1000 done clear
  View Solution play_arrow

• question_answer85)
  Who gave the concept that for a double stranded DNA the ratio between A = T and G s C are equal and constant?
  A)
  Watson and Crick done clear
  B)
  Wilkins and Franklin done clear
  C)
  Wilkins and Chargaff done clear
  D)
  Chargaff done clear
  View Solution play_arrow

• question_answer86)
  A stretch of DNA consisting of 10-20 bases is most appropriately be called as
  A)
  polynucleotide done clear
  B)
  nucleotides done clear
  C)
  nucleosides done clear
  D)
  oligonucleotide done clear
  View Solution play_arrow

• question_answer87)
  Choose the right one which denotes genetic diversity.
  A)
  Chromosomes \[\to \] Nucleotides \[\to \] Genes \[\to \] Individuals \[\to \] Populations done clear
  B)
  Population \[\to \] Individuals \[\to \]Chromosomes \[\to \] Nucleotides\[\to \] Genes done clear
  C)
  Nucleotides \[\to \] Genes \[\to \] Chromosomes \[\to \]Individuals \[\to \] Populations done clear
  D)
  Nucleotides \[\to \] Genes \[\to \] Chromosomes \[\to \]Individuals \[\to \] Populations done clear
  View Solution play_arrow

• question_answer88)
  The sequence of nitrogenous bases in one strand of DNA are 3' TAC GCG ACG 5'. The complementary DNA strand should have
  A)
  5' AUG CGC TGC 3' done clear
  B)
  3' ATG CGC TGC 5' done clear
  C)
  5' UAC GCG ACG 3' done clear
  D)
  5' ATG CGC TGC 3' done clear
  View Solution play_arrow

• question_answer89)
  Identify the wrong statement about DNA.
  A)
  The length of DNA is defined as the number of base pairs present in it. done clear
  B)
  Cytosine is common to both DNA and RNA. done clear
  C)
  In a nucleotide, the nitrogenous base is linked to a phosphate group. done clear
  D)
  Thymine is chemically 5-methyl uracil. done clear
  View Solution play_arrow

• question_answer90)
  Which property among these listed below is not a criterion for a molecule to act as a genetic material
  A)
  Generate its replica done clear
  B)
  Chemically and structurally stable done clear
  C)
  Mutate slowly to facilitate evolution done clear
  D)
  Destroy itself after every cell cycle. done clear
  View Solution play_arrow

• question_answer91)
  Match column I with column II and choose the correct option.

  	Column - I (Scientist)		Column - II (Concept)
  I.	Taylor and colleagues	[A]	Lac operon
  II.	Hershey &, Chase	[B]	DNA replicates semi-conservatively
  III.	Grififfith	[C]	Transforming principle
  IV.	Jacob & Monod	[D]	DNA is the genetic material
  		[E]	Transcription

  A)
  I-B, II-E, III-A, IV-C done clear
  B)
  I-C, II-D, III-B, IV-A done clear
  C)
  I-B, II-D, III-C, IV-A done clear
  D)
  I-A, II-E, III-D, IV-B done clear
  View Solution play_arrow

• question_answer92)

  Consider the parts labelled in 1, 2, 3 and 4 respectively in the following diagram of Replicating Fork and find out the correct sequences :

  A)
  1 - Coding DNA; 2 - Discontinuous synthesis; 3 - Newly synthesized strands; 4 - Continuous synthesis done clear
  B)
  1 - Template DNA; 2 - Continuous synthesis; 3 - Newly synthesized strands; 4 - Continuous synthesis                                                          done clear
  C)
  1 - Template DNA; 2 - Discontinuous synthesis; 3 - Newly synthesized strands; 4 - Discontinuous synthesis done clear
  D)
  1 - Template DNA; 2 - Discontinuous synthesis; 3 - Newly synthesized strands; 4 - Continuous synthesis done clear
  View Solution play_arrow

• question_answer93)
  Retroviruses are implicated as a cause for cancer in humans because
  A)
  Carry gene for reverse transcriptase done clear
  B)
  May carry cellular oncogenes in their genome done clear
  C)
  May carry viral oncogenes in their genome done clear
  D)
  Carry single stranded RNA as their genetic material done clear
  View Solution play_arrow

• question_answer94)
  RNA retroviruses have a special enzyme that
  A)
  Transcribes viral RNA to c-DNA done clear
  B)
  Disintegrates host's DNA done clear
  C)
  Translates host's DNA done clear
  D)
  Polymerises hosts DNA done clear
  View Solution play_arrow

• question_answer95)
  Genes that are involved in turning on or off the transcription of a set of structural genes are called
  A)
  Polymorphic genes done clear
  B)
  Regulator genes done clear
  C)
  Redundant genes done clear
  D)
  Operator genes done clear
  View Solution play_arrow

• question_answer96)
  Our muscle cells are different form our nerve cells mainly because
  A)
  They express different genes done clear
  B)
  They contain different genes done clear
  C)
  They use different genetic codes done clear
  D)
  They have unique ribosomes done clear
  View Solution play_arrow

• question_answer97)
  In 'lac Operon' represser protein attaches to
  A)
  Operator done clear
  B)
  Promoter done clear
  C)
  Regulator done clear
  D)
  b-galactosidase done clear
  View Solution play_arrow

• question_answer98)
  During splicing the exons are joined and the enzymes which catalyzes this reaction is
  A)
  RNA ligase done clear
  B)
  RNA catalase done clear
  C)
  RNA polymerase done clear
  D)
  RNA permease done clear
  View Solution play_arrow

• question_answer99)

  What is shown in the following figure ?

  A)
  Schematic structure of a transcription unit done clear
  B)
  Schematic structure of a replication unit done clear
  C)
  Schematic structure of a translation unit done clear
  D)
  Schematic structure of a protein synthesis unit done clear
  View Solution play_arrow

• question_answer100)
  A polysome is formed by
  A)
  A cluster of ribosomes done clear
  B)
  Many ribosomes attached to a m RNA done clear
  C)
  A cluster of ribosomal sub units done clear
  D)
  Many mRNAs being attached to a ribosome done clear
  View Solution play_arrow

• question_answer101)
  During protein synthesis the anticodon on tRNA pairs with
  A)
  Codon on tRNA done clear
  B)
  Codon on mRNA done clear
  C)
  Ribosome unit done clear
  D)
  Codon on rRNA done clear
  View Solution play_arrow

• question_answer102)
  One of these is not associated with termination of protein synthesis
  A)
  UAA done clear
  B)
  UAG done clear
  C)
  UGA done clear
  D)
  AUG done clear
  View Solution play_arrow

• question_answer103)
  RNA polymerase I of an eukaryotic cell catalyzes
  A)
  Elongation in transcription done clear
  B)
  rRNA synthesis done clear
  C)
  mRNA synthesis done clear
  D)
  tRNA synthesis done clear
  View Solution play_arrow

• question_answer104)
  During translation initiation in prokaryotes, GTP is required for
  A)
  Formation of formyl-met-tRNA done clear
  B)
  Binding of 30 S subunit of ribosome with mRNA done clear
  C)
  Association of 30S mRNA with forrnyl met-tRNA done clear
  D)
  Association of 50S subunit of ribosome with initiation complex done clear
  View Solution play_arrow

• question_answer105)
  Match the components of lac operon of Escherichia coli and find out the correct combination

  [a]	Structural gene	p.	Binding site for represser protein
  [b]	Operator gene	q.	Codes for represser protein
  [c]	Promoter gene	r.	Induces lactose transport from the medium
  [d]	Regulator gene	s.	Codes for enzyme proteins
  		t.	Binding site for RNA polymerase

  A)
  a-q, b-t, c-p, d-r done clear
  B)
  a-r, b-s, c-t, d-p done clear
  C)
  a-s, b-p, c-t, d-q done clear
  D)
  a-t, b-s, c-q, d-p done clear
  View Solution play_arrow

• question_answer106)
  Which of the following is the Pribnow box?
  A)
  5'TATAAT3' done clear
  B)
  5' TAATTA3' done clear
  C)
  5'AATAAT3' done clear
  D)
  5'ATATTA3' done clear
  View Solution play_arrow

• question_answer107)
  Which one of the following codons codes for the same information as UGC
  A)
  UGU done clear
  B)
  UGA done clear
  C)
  UAG done clear
  D)
  AGG done clear
  View Solution play_arrow

• question_answer108)
  Genetic code is degenerate because
  A)
  Codons have same energy level done clear
  B)
  Each codon has a different meaning done clear
  C)
  Each codon has many meanings done clear
  D)
  Many codons have same meaning done clear
  View Solution play_arrow

• question_answer109)
  Degeneration of a genetic code is attributed to
  A)
  Entire codon done clear
  B)
  First member of a codon done clear
  C)
  Second member of a codon done clear
  D)
  Third member of a codon done clear
  View Solution play_arrow

• question_answer110)
  During transcription, the DNA site at which RNA polymerase binds, is called
  A)
  Regulator done clear
  B)
  Receptor done clear
  C)
  Enhancer done clear
  D)
  Promoter done clear
  View Solution play_arrow

• question_answer111)
  During transcription, if nucleotide sequence of DNA strand, that is being coded is ATACG, then the nucleotide sequence in m-RNA would be
  A)
  UATGC done clear
  B)
  TATGC done clear
  C)
  TCTGG done clear
  D)
  UAUGC done clear
  View Solution play_arrow

• question_answer112)

  What is shown in the following figure?

  A)
  Process of transcription in virus                  done clear
  B)
  Process of transcription in bacteria done clear
  C)
  Process of transcription in yeast done clear
  D)
  Process of transcription in human done clear
  View Solution play_arrow

• question_answer113)
  Which one of the following triplet codes is correctly matched with its specificity for an amino acid in protein synthesis or as 'start' or 'stop' signal?
  A)
  UUU-Stop done clear
  B)
  UGU-Leucine done clear
  C)
  UAG-Tyrosine done clear
  D)
  UCG-Start done clear
  View Solution play_arrow

• question_answer114)
  A mutation of one base of the first codon, of a gene produces a non-functional protein such a mutation is called
  A)
  Non sense mutation done clear
  B)
  Mis sense mutation done clear
  C)
  Frameshift mutation done clear
  D)
  Reverse mutation done clear
  View Solution play_arrow

• question_answer115)
  Which of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?
  A)
  UUU-valine done clear
  B)
  A AA-lysine done clear
  C)
  AUG cysteine done clear
  D)
  CCC - Alanine done clear
  View Solution play_arrow

• question_answer116)
  DNA fingerprinting is related to
  A)
  Molecular analysis of profiles of DNA samples done clear
  B)
  Analysis of DNA samples using imprinting devices done clear
  C)
  Techniques used for molecular analysis of different specimens of DNA done clear
  D)
  Techniques used in identification of finger prints of different persons done clear
  View Solution play_arrow

• question_answer117)
  Operon is
  A)
  Sequence of three nitrogen bases determining a single amino acid done clear
  B)
  A set of closely placed genes regulating a metabolic pathway in prokaryotes done clear
  C)
  Segment of DNA specifying a polypeptide done clear
  D)
  Gene responsible for switching on and switching off of other genes done clear
  View Solution play_arrow

• question_answer118)
  A coding sequence made of alternating C and U bases would form a polypeptide having
  A)
  Alternating leu or ser residues done clear
  B)
  Either leu or ser residues done clear
  C)
  Only ser residues done clear
  D)
  Only leu residues done clear
  View Solution play_arrow

• question_answer119)
  A gene of operon which forms the represser protein is :
  A)
  Operator done clear
  B)
  Promoter done clear
  C)
  Regulator done clear
  D)
  Structural done clear
  View Solution play_arrow

• question_answer120)
  Clover leaf secondary structure of t-RNA has a loop for:
  A)
  Three nucleotides of a codon done clear
  B)
  Three nucleotides of an anticodon done clear
  C)
  No nucleotides done clear
  D)
  Both [a] and [b] done clear
  View Solution play_arrow

• question_answer121)
  During transcription holoenzyme RNA polymerase binds to a DNA sequence and the DNA assumes a saddle like structure at the point. What is that sequence called?
  A)
  CAAT box done clear
  B)
  GGTT box done clear
  C)
  AAAT box done clear
  D)
  TATA box done clear
  View Solution play_arrow

• question_answer122)
  Protein synthesis in an animal cell occurs
  A)
  Only on the ribosomes present in cytosol done clear
  B)
  On ribosomes present in cytoplasm as well as in mitochondria. done clear
  C)
  Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum done clear
  D)
  On ribosomes present in the nucleolus as well as in cytoplasm. done clear
  View Solution play_arrow

• question_answer123)
  Which one of the following makes use of RNA as a template to synthesize DNA?
  A)
  Reverse transcriptase done clear
  B)
  DNA dependent RNA polymerase done clear
  C)
  DNA polymerase done clear
  D)
  RNA polymerase done clear
  View Solution play_arrow

• question_answer124)
  In a given DNA segment ATG ACC AGG ACC CCA ACA, the first base gets mutated. The effect of this on coding by this DNA segment will result in :
  A)
  Complete change in the type as well as sequence of amino acids done clear
  B)
  Change in first amino acid only done clear
  C)
  No change in the sequence done clear
  D)
  One amino acid less in protein done clear
  View Solution play_arrow

• question_answer125)
  In the lac operon, the structural genes are switched off when
  A)
  Represser binds to operator done clear
  B)
  Represser binds to promoter done clear
  C)
  Represser binds to regulator done clear
  D)
  Represser binds to inducer done clear
  View Solution play_arrow

• question_answer126)
  Dr. Khorana and his colleagues synthesised an RNA molecule with repeating sequence of UG N-bases (UG UG UG UG UG UG). It produced a tetrapeptide with alternating sequence of cystein and valine. It proves that codons for cystein and valine are :
  A)
  UGU and GUU done clear
  B)
  UGU and GUG done clear
  C)
  UUG and GGU done clear
  D)
  GUG and UGU done clear
  View Solution play_arrow

• question_answer127)
  During protein synthesis AUG functions as the initiation codon in mRNA. What should be the anticodon in tRNA molecule that picks up and brings the amino acid specified by this codon?
  A)
  UAC done clear
  B)
  TAC done clear
  C)
  CAU done clear
  D)
  GUA done clear
  View Solution play_arrow

• question_answer128)
  DNA probes are copied from the messenger RNA molecules with the help of
  A)
  Restriction enzymes done clear
  B)
  Reverse transcriptase done clear
  C)
  DNA polymerase done clear
  D)
  Adenosine deaminase done clear
  View Solution play_arrow

• question_answer129)

  Consider the parts labelled in 1 and 2 respectively in the following diagram of the lac Operon and find out the correct sequences :

  A)
  1 - Represser; 2 - Represser mRNA done clear
  B)
  1 - Represser mRNA; 2 - Represser done clear
  C)
  1 - Represser tRNA; 2 - Represser done clear
  D)
  1 - Represser rRNA; 2 - Represser done clear
  View Solution play_arrow

• question_answer130)
  Antiparallel strands of a DNA molecule mean that
  A)
  One strand turns anti-clockwise done clear
  B)
  The phosphate groups of two DNA strands, at their ends, share the same position. done clear
  C)
  The phosphate groups at the start of two DNA strands are in opposite position or pole done clear
  D)
  One strand turns clockwise done clear
  View Solution play_arrow

• question_answer131)
  Amino acid sequence, in protein synthesis is decided by the sequence of :
  A)
  tRNA done clear
  B)
  mRNA done clear
  C)
  cDNA done clear
  D)
  rRNA done clear
  View Solution play_arrow

• question_answer132)
  During protein synthesis in an organism, at one point the process comes to a halt. Select the group of the three codons from the following, from which any one of the three could bring about this halt :
  A)
  UUU, UCC, UAU done clear
  B)
  UUC, UUA, UAC done clear
  C)
  UAG, UGA, UAA done clear
  D)
  UUG, UCA. UCG done clear
  View Solution play_arrow

• question_answer133)
  Which is synthesized by RNA polymerase I:
  A)
  r-RNA sequence done clear
  B)
  Prokaryotic m-RNA done clear
  C)
  Eukaryotic m-RNA done clear
  D)
  Prokaryotic r-RNA done clear
  View Solution play_arrow

• question_answer134)
  The enzyme involved in transcription is :
  A)
  RNA polymerase done clear
  B)
  DNA polymerase I done clear
  C)
  DNA polymerase II done clear
  D)
  DNA polymerase III done clear
  View Solution play_arrow

• question_answer135)
  The Okazaki fragments in lagging DNA chain growth :
  A)
  Polymerize in the -3' to -5' direction and forms replication fork done clear
  B)
  Prove semi-conservative nature of DNA replication done clear
  C)
  Polymerize in -5 to -3' direction and explain -3' to -5 DNA replication done clear
  D)
  Result in transcription done clear
  View Solution play_arrow

• question_answer136)
  A sequential expression of a set of human genes occurs, when a steroid molecule binds to the :
  A)
  Messenger RNA done clear
  B)
  DNA sequence done clear
  C)
  Ribosome done clear
  D)
  Transfer RNA done clear
  View Solution play_arrow

• question_answer137)
  During transcription, RNA polymerase holoenzyme binds to a gene promoter and assumes a saddle like Structure. What is it's DNA binding sequence?
  A)
  AATT done clear
  B)
  CACC done clear
  C)
  TATA done clear
  D)
  TTAA done clear
  View Solution play_arrow

• question_answer138)
  Molecular basis of organ differentiation depends on the modulation in transcription by :
  A)
  Ribosome done clear
  B)
  Transcription factors done clear
  C)
  Anticodon done clear
  D)
  RNA polymerase done clear
  View Solution play_arrow

• question_answer139)
  In a mutational event, when adenine is replaced by guanine, it is the case of
  A)
  Frameshift mutation done clear
  B)
  Transcription done clear
  C)
  Transition done clear
  D)
  Transversion done clear
  View Solution play_arrow

• question_answer140)
  During transcription, the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in mRNA would be :
  A)
  TAT GC done clear
  B)
  TCTGG done clear
  C)
  UAUGC done clear
  D)
  UA TGG done clear
  View Solution play_arrow

• question_answer141)
  Which of the following statements is not true for retroviruses?
  A)
  DNA is not present at any stage in the life cycle of retroviruses done clear
  B)
  Retroviruses carry genes for RNA dependent DNA polymerase done clear
  C)
  The genetic material in mature retroviruses is RNA done clear
  D)
  Retroviruses are causative agents for certain kinds of cancer in man. done clear
  View Solution play_arrow

• question_answer142)
  Which form of RNA has a structure resembling clover leaf?
  A)
  rRNA done clear
  B)
  hnRNA done clear
  C)
  mRNA done clear
  D)
  tRNA done clear
  View Solution play_arrow

• question_answer143)
  Anticodon is present on :
  A)
  rRNA done clear
  B)
  tRNA done clear
  C)
  mtDNA done clear
  D)
  mRNA done clear
  View Solution play_arrow

• question_answer144)
  Regulator gene controls chemical synthesis (Operon concept) by :
  A)
  Inhibiting transcription of mRNA done clear
  B)
  Inhibiting enzymes done clear
  C)
  Inhibiting passage of mRNA done clear
  D)
  Inhibiting substrate enzyme reaction done clear
  View Solution play_arrow

• question_answer145)
  During translation initiation in prokaryotes, a GTP molecule is needed in :
  A)
  Association of 30S, mRNA with formyl-met-tRNA done clear
  B)
  Association of 50S subunit of ribosome with initiation complex done clear
  C)
  Formation of formyl-met-tRNA done clear
  D)
  Binding of 30 subunits of ribosome with mRNA done clear
  View Solution play_arrow

• question_answer146)
  What would happen if in a gene encoding a polypeptide of 50 amino acids will be (UAC) is mutated of UAA?
  A)
  A polypeptide of 49 amino acids will be formed done clear
  B)
  A polypeptide of 25 amino acids will be formed done clear
  C)
  A polypeptide of 24 amino acids will be formed done clear
  D)
  Two polypeptides of 24 and 25 amino acids will be formed done clear
  View Solution play_arrow

• question_answer147)
  Non-genetic sex determination is found in:
  A)
  Fruitfly done clear
  B)
  Bonellia done clear
  C)
  Cow done clear
  D)
  Birds done clear
  View Solution play_arrow

• question_answer148)
  According to wobble hypothesis
  A)
  The process of polypeptide chain elongation has been established done clear
  B)
  First base is unstable done clear
  C)
  Second base is most unstable done clear
  D)
  Third base is most unstable done clear
  View Solution play_arrow

• question_answer149)
  In bacterial DNA replication, synthesis starting from the site of origin of replication
  A)
  Involves RNA primers done clear
  B)
  Requires telomerase done clear
  C)
  Proceeds unidirectionally done clear
  D)
  Moves bidirectionally done clear
  View Solution play_arrow

• question_answer150)
  In the DNA molecule:
  A)
  Proportion of adenine in relation to thymine varies with organism done clear
  B)
  There are two strands which run antiparallel - one in 5'-3' direction and other in 3'-5' direction done clear
  C)
  The total amount of purine nucleotides and pyrimidine nucleotides is not always equal done clear
  D)
  There are two strands which run parallel in the 5'-3' direction done clear
  View Solution play_arrow

• question_answer151)
  Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with category mentioned against it?
  A)
  Guanine, adenine - purines done clear
  B)
  Adenine, thymine - purines done clear
  C)
  Thymine, uracil - pyrimidines done clear
  D)
  Uracil, cytosine - pyrimidines done clear
  View Solution play_arrow

• question_answer152)
  What is antisense technology?
  A)
  When a piece of RNA that is complimentary in sequence is used to stop expression of specific gene done clear
  B)
  RNA polymerase producing DNA done clear
  C)
  A cell displaying a foreign antigen used for synthesis of antigens done clear
  D)
  Production of somaclonal variants in tissue culture. done clear
  View Solution play_arrow

• question_answer153)
  Which one of the following is having ssRNA?
  A)
  TMV done clear
  B)
  \[{{T}_{2}}\]bacteriophage done clear
  C)
  Pox virus done clear
  D)
  \[\phi \times 174\] done clear
  View Solution play_arrow

• question_answer154)
  Length of DNA in human is about?
  A)
  1.2 m done clear
  B)
  2.2 m done clear
  C)
  3.2 m done clear
  D)
  4.2 m done clear
  View Solution play_arrow

• question_answer155)
  The portion of DNA which contains information for an entire polypeptide is called :
  A)
  Cistron done clear
  B)
  Muton done clear
  C)
  Recon done clear
  D)
  Operon done clear
  View Solution play_arrow

• question_answer156)
  DNA element with ability to change its position, is called :
  A)
  Cistron done clear
  B)
  Transposon done clear
  C)
  Intron done clear
  D)
  Recon done clear
  View Solution play_arrow

• question_answer157)
  Which one of the following pairs is correctly matched with regard to the codon and the amino acid coded by it?
  A)
  UUA-valine done clear
  B)
  AAA-lysine done clear
  C)
  AUG-cysteine done clear
  D)
  CCC-alanine done clear
  View Solution play_arrow

• question_answer158)
  Out of 64 codons only 61 codes for the 20 different amino acids. This character of genetic code is called :
  A)
  Degeneracy done clear
  B)
  Non ambiguous nature done clear
  C)
  Redundancy done clear
  D)
  Overlapping done clear
  View Solution play_arrow

• question_answer159)
  mRNA direct the building of proteins through a sequence of :
  A)
  Exons done clear
  B)
  Introns done clear
  C)
  Codons done clear
  D)
  Anticodons done clear
  View Solution play_arrow

• question_answer160)
  Beadle and Tatum showed that each kind of mutant bread mould they studied lacked a specific enzyme. Their experiments demonstrated that :
  A)
  Cells need specific enzymes in order to function done clear
  B)
  Genes are made up of DNA done clear
  C)
  Enzymes are required to repair damage done clear
  D)
  Genes carry information for making proteins done clear
  View Solution play_arrow

• question_answer161)
  There is no DNA in
  A)
  A mature spermatozoan done clear
  B)
  Hair root done clear
  C)
  An enucleated ovum done clear
  D)
  Mature RBC done clear
  View Solution play_arrow

• question_answer162)
  Semi-conservative replication of DNA was first time demonstrated in :
  A)
  Drosophila melanogaster done clear
  B)
  Escherichia toll done clear
  C)
  Streptococcus pneumonia done clear
  D)
  Salmonella typhimurium done clear
  View Solution play_arrow

• question_answer163)
  What is not true for genetic code?
  A)
  It is degenerate done clear
  B)
  It is ambiguous done clear
  C)
  A codon in mRNA is read in a contiguous fashion done clear
  D)
  It is nearly universal done clear
  View Solution play_arrow

• question_answer164)
  Formation of both peptide and glycosidic bonds involves :
  A)
  Hydration done clear
  B)
  Dehydration done clear
  C)
  Esterification done clear
  D)
  Acidification done clear
  View Solution play_arrow

• question_answer165)
  What will be the correct gene expression pathway?
  A)
  Gene-mRNA-transcription-translation-protein done clear
  B)
  Transcription-gene-translation-mRNA-protein done clear
  C)
  Gene-transcription-mRNA-translation-protein done clear
  D)
  Gene-translation-mRNA-transcription-protein done clear
  View Solution play_arrow

• question_answer166)
  The main aim of the human genome project is
  A)
  To introduce new genes into humans done clear
  B)
  To identify and sequence all the genes present in human DNA done clear
  C)
  To develop better techniques for comparing two different human DNA samples done clear
  D)
  To remove disease causing genes from human DNA. done clear
  View Solution play_arrow

• question_answer167)
  In genetic fingerprinting, the 'probe' refers to
  A)
  A radioactively labelled single stranded DNA molecule done clear
  B)
  A radioactively labelled single stranded RNA molecule done clear
  C)
  A radioactively labelled double stranded RNA molecule done clear
  D)
  A radioactively labelled double stranded DNA molecule. done clear
  View Solution play_arrow

• question_answer168)
  Match the codons with their respective amino acids and choose the correct answer :

  	Column - I		Column - II
  [A]	UUU	1.	Serine
  [B]	GGG	2.	Methionine
  [C]	UCU	3.	Phenylalanine
  [D]	CCC	4.	Glycine
  [E]	AUG	5.	Proline

  A)
  A - 3, B - 4, C - 1, D - 5, E - 2 done clear
  B)
  A - 3, B - 1, C - 4, D - 5, E - 2 done clear
  C)
  A - 3, B - 4, C - 5, D - 1, E - 2 done clear
  D)
  A - 2, B - 4, C - 1, D - 5, E - 3 done clear
  View Solution play_arrow

• question_answer169)
  In the Lac operon system, (\[\beta \]-galactosidase is coded by :
  A)
  a-gene done clear
  B)
  i-gene done clear
  C)
  1-gene done clear
  D)
  z-gene done clear
  View Solution play_arrow

• question_answer170)

  Consider the following statements

  I. r-RNA provides the template for synthesis of proteins

  II. t-RNA brings amino acids and reads the genetic code

  III. RNA polymerase binds to promoter and initiates transcription

  IV. A segment of DNA coding for polypeptide is called intron

  A)
  I and III are correct done clear
  B)
  I and II are correct done clear
  C)
  I, II and III are correct done clear
  D)
  II and III are correct done clear
  View Solution play_arrow

• question_answer171)
  Locations on sites in the human DNA where single base DNA differences occurs are called :
  A)
  Repetitive DNA done clear
  B)
  VNTR done clear
  C)
  Snips done clear
  D)
  SSBP done clear
  View Solution play_arrow

• question_answer172)
  The one aspect which is not a salient feature of genetic code, is its being
  A)
  Specific done clear
  B)
  Degenerate done clear
  C)
  Ambiguous done clear
  D)
  Universal done clear
  View Solution play_arrow

• question_answer173)
  Which one of the following does not follow the central dogma of molecular biology ?
  A)
  HIV done clear
  B)
  Pea done clear
  C)
  Mucor done clear
  D)
  Chlamydomonas done clear
  View Solution play_arrow

• question_answer174)
  In eukaryotes cell transcription, RNA splicing and RNA capping take place inside the
  A)
  ribosomes done clear
  B)
  nucleus done clear
  C)
  dictyosomes done clear
  D)
  ER done clear
  View Solution play_arrow

• question_answer175)

  Select the two correct statements out of the four (1-4), given below about lac operon :

  1. Glucose or galactose may bind with the represser and inactivate it

  2. In the absence of lactose the represser binds with the operator region

  3. The z-gene codes for permease

  4. This was elucidated by Francois Jacob and Jacque Monod

  The correct statements are

  A)
  1 and 4 done clear
  B)
  2 and 3 done clear
  C)
  1 and 3 done clear
  D)
  2 and 4 done clear
  View Solution play_arrow

• question_answer176)
  The lac operon consists of
  A)
  four regulatory genes only done clear
  B)
  one regulatory gene and three structural genes done clear
  C)
  two regulatory genes and two structural genes done clear
  D)
  three regulatory genes and three structural genes done clear
  View Solution play_arrow

• question_answer177)
  The 3' - 5' phosphodiester linkages inside a polynucleotide chain serve to join :
  A)
  One DNA strand with the other DNA strand done clear
  B)
  One nucleoside with another nucleoside done clear
  C)
  One nucleotide with another nucleotide done clear
  D)
  One nitrogenous base with pentose sugar done clear
  View Solution play_arrow

• question_answer178)
  In transcription in eukaryotes, heterogeneous nuclear RNA (hnRNA) is transcribed by :
  A)
  RNA polymerase I done clear
  B)
  RNA polymerase II done clear
  C)
  RNA polymerase III done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer179)
  Non-proteinaceous enzyme that acts as a catalyst for the formation of peptide bond is :
  A)
  Spliceosome done clear
  B)
  Ribozyme done clear
  C)
  RNA polymerase I done clear
  D)
  RNA polymerase III done clear
  View Solution play_arrow

• question_answer180)
  Methyl guanosine triphosphate is added to the 5' end of hnRNA in a process of :
  A)
  Splicing done clear
  B)
  Capping done clear
  C)
  Tailing done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer181)
  UTR is the part of
  A)
  rRNA done clear
  B)
  tRNA done clear
  C)
  mRNA done clear
  D)
  scRNA done clear
  View Solution play_arrow

• question_answer182)
  RNA polymerase II is responsible for transcription of :
  A)
  rRNA done clear
  B)
  hnRNA done clear
  C)
  tRNA done clear
  D)
  snRNA done clear
  View Solution play_arrow

• question_answer183)
  Which of the following sequences will be produced as a result of transcription of the DNA sequence CGATTACAG?                                                  
  A)
  GCUAAUGUC done clear
  B)
  CGUAAUCUG done clear
  C)
  GCTAATGTC done clear
  D)
  GCUAATCTG done clear
  View Solution play_arrow

• question_answer184)
  Har Govind Khorana is known for :
  A)
  Discovery of DNA structure done clear
  B)
  Synthesis of protein done clear
  C)
  Discovery of DNA ligase enzyme done clear
  D)
  Discovery of tRNA done clear
  View Solution play_arrow

• question_answer185)
  The lac operon consists of :
  A)
  Four regulatory genes only done clear
  B)
  One regulatory gene and three structural genes done clear
  C)
  Two regulatory genes and two structural genes done clear
  D)
  Three regulatory genes and three structural genes done clear
  View Solution play_arrow

• question_answer186)
  The Lac operon "Inducer Lactose" serves as an enzyme substrate for
  A)
  Transacetylase done clear
  B)
  Endonuclease done clear
  C)
  Permease done clear
  D)
  Beta-galactosidase done clear
  View Solution play_arrow

• question_answer187)
  DNA finger printing has application in the field of
  A)
  Forensic Science done clear
  B)
  Genetic Biodiversity done clear
  C)
  Evolutionary Biology done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer188)

  Given below is a sample of a portion of DNA strand giving the base sequence on the opposite strands. What is so special shown in it?

  5' - GAATTC - 3'

  3' - CTTAAG - 5'

  A)
  Deletion mutation done clear
  B)
  Start codon at the 5' end done clear
  C)
  Palindromic sequence of base pair done clear
  D)
  Replication completed done clear
  View Solution play_arrow

• question_answer189)
  What are those structure that appear as "beads-on-string" in the chromosomes when viewed under electron microscope ?
  A)
  Nucleotides done clear
  B)
  Nucleosomes done clear
  C)
  Base pairs done clear
  D)
  Genes done clear
  View Solution play_arrow

• question_answer190)
  In genetic code, 61 codons code for 20 different types of amino acids. This is called :
  A)
  Colinearity done clear
  B)
  Commaless done clear
  C)
  Degeneracy done clear
  D)
  Nonambiguity done clear
  View Solution play_arrow

• question_answer191)
  The term, genetic RNA refers to :
  A)
  genetic material of RNA viruses done clear
  B)
  RNA that carries genetic message done clear
  C)
  RNA that helps gene regulation in lac-operon done clear
  D)
  RNA present in mitochondria done clear
  View Solution play_arrow

• question_answer192)
  What will be the codon in mRNA if the DNA codes are ATG-CAG ?
  A)
  TAC - GTC done clear
  B)
  UAC - GUC done clear
  C)
  UCA - TUA done clear
  D)
  TCA - GTC done clear
  View Solution play_arrow

• question_answer193)
  Removal of RNA polymerase III from nucleoplasm will affected the synthesis of
  A)
  mRNA done clear
  B)
  rRNA done clear
  C)
  tRNA done clear
  D)
  hn RNA done clear
  View Solution play_arrow

• question_answer194)
  Which one of the following is not a part of a transcription unit in DNA?
  A)
  A promoter done clear
  B)
  The structural gene done clear
  C)
  The inducer done clear
  D)
  A terminator done clear
  View Solution play_arrow

• question_answer195)
  If one or DNA has the nitrogenous base sequence as ATCTG, what would be the complementary RNA strand sequence ?
  A)
  AACTG done clear
  B)
  ATCGU done clear
  C)
  TTAGU done clear
  D)
  UAGAC done clear
  View Solution play_arrow

• question_answer196)
  Which one of the following represents a palindromic sequence in DNA ?
  A)

  5' - CATTAG - 3'

  3' - GATAAC - 5'

  done clear
  B)

  5' - GATACC - 3'

  3' - CCTAAG - 5'

  done clear
  C)

  5' - GAATTC - 3'

  3' - CTTAAG - 5'

  done clear
  D)

  5' - CCAATG - 3'

  3' - GAATCC - 5'

  done clear
  View Solution play_arrow

• question_answer197)

  Read the following four statements (a - d)

  [a] In transcription, adenosine pairs with uracil

  [b] Regulation of lac operon by represser is referred to as positive regulation

  [c] The human genome has approximately 50,000 genes

  [d] Hemophilia is a sex-linked recessive disease

  How many of the above statements are right?

  A)
  Four done clear
  B)
  One done clear
  C)
  Two                                done clear
  D)
  Thee done clear
  View Solution play_arrow

• question_answer198)
  Which one of the following is a wrong statement regarding mutations?
  A)
  UV and Gamma rays are mutagens done clear
  B)
  Change in a single base pair of DNA does not cause mutation done clear
  C)
  Deletion and insertion of base pairs cause frame shift mutations done clear
  D)
  Cancer cells commonly show chromosomal aberrations done clear
  View Solution play_arrow

• question_answer199)
  Choose the correct statement pertaining to genetic code
  A)
  It includes 61 codons for amino acids and 3 stop codons done clear
  B)
  Is universal, and has 3 bases per codon done clear
  C)
  Some amino acids are coded by multiple codons done clear
  D)
  All of these done clear
  View Solution play_arrow

• question_answer200)

  Identify the correct sequence of events in the viral replication process.

  (I) Eclipse

  (II) Maturation

  (III) Adsorption

  (IV) Assembly

  (V) Penetration

  (VI) Lysis

  A)
  \[I\to II\to III\to IV\to V\to VI\] done clear
  B)
  \[II\to I\to III\to IV\to V\to VI\] done clear
  C)
  \[III\to V\to I\to II\to IV\to VI\] done clear
  D)
  \[III\to V\to I\to IV\to II\to VI\] done clear
  View Solution play_arrow

• question_answer201)
  Select the correct statement regarding protein synthesis
  A)
  When the small subunit of the ribosome encounters an mRNA the process of translation begins done clear
  B)
  Peptidase catalyses the formation of peptide bond done clear
  C)
  UTRs are present between the start codon and stop codon done clear
  D)
  At the end of translation, the release factor binds to the initiation codon done clear
  View Solution play_arrow

• question_answer202)
  To which of the following factors, RNA polymerase binds transiently to initiate transcription?
  A)
  rho done clear
  B)
  beta done clear
  C)
  gamma done clear
  D)
  sigma done clear
  View Solution play_arrow

• question_answer203)
  The enzyme(s) responsible for the transcription of snRNAs in eukaryotes is/are
  A)
  RNA polymerase I done clear
  B)
  RNA polymerase I and II done clear
  C)
  RNA polymerase II done clear
  D)
  RNA polymerase III done clear
  View Solution play_arrow

• question_answer204)

  Consider the parts labelled in 1, 2, 3 and 4 respectively in the following diagram of the lac Operon and find out the correct sequences :

  A)
  1 - Translation; 2 - \[\beta \] - galactosidase; 3 - Permease; 4 - Transacetylase done clear
  B)
  1 - Replication; 2 galactosidase; 3 - Permease; 4 - Transacetylase done clear
  C)
  1 - Transcription; 2 galactosidase; 3 - Permease; 4 - Endonuclease done clear
  D)
  1 - Transcription; 2 galactosidase; 3 - Permease; 4 - Transacetylase done clear
  View Solution play_arrow

• question_answer205)
  Choose the wrong statement from the following
  A)
  VNTR belong to a class of micro satellite DNA done clear
  B)
  DNA sequencers work on the principle developed by Frederick Sanger done clear
  C)
  HGP was coordinated by US Department of Energy and the National Institute of Health done clear
  D)
  DNA finger printing involves identifying similarities in repetitive DNA done clear
  View Solution play_arrow

• question_answer206)
  In lac operon, the genes a, i, y and z code respectively for
  A)
  represser protein, permease, \[\beta \]-galactosidase, transacetylase done clear
  B)
  transacetylase, permease, \[\beta \]-galactosidase, represser protein done clear
  C)
  permease, transacetylase, represser protein, \[\beta \]-galactosidase done clear
  D)
  transacetylase, represser protein, permease, \[\beta \]-galactosidase done clear
  View Solution play_arrow

• question_answer207)
  Addition or deletion of a single nucleotide results in which type of mutation?
  A)
  Deficiency done clear
  B)
  Duplication done clear
  C)
  Frameshift mutation done clear
  D)
  none of these done clear
  View Solution play_arrow

• question_answer208)
  Which of the following corresponds to mutagens ?
  A)
  Chemical and radiations which cause changes in the genetic material of a cell done clear
  B)
  Various archaebacteria that produce methane done clear
  C)
  Chemical which reacts with ozone molecules and destroy them done clear
  D)
  RNA molecules that infect plant cells and cause diseases done clear
  View Solution play_arrow

• question_answer209)
  Which enzymes will be produced in a cell in which there is a nonsense mutation in the lac Y gene ?
  A)
  Transacetylase done clear
  B)
  Lactose permease and transacetylase done clear
  C)
  P-galactosidase done clear
  D)
  Lactose permease done clear
  View Solution play_arrow

• question_answer210)
  The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C. \[DNA\xrightarrow{A}mRNA\xrightarrow{B}protein\xrightarrow[C]{\Pr oposed\,by}\]s
  A)
  A - transcription B -translation C - Francis Crick done clear
  B)
  A - translation B - extension C - Rosalind Franklin done clear
  C)
  A - transcription B - replication C - James Watson done clear
  D)
  A - translation B - transcription C - Erevin Chargaff done clear
  View Solution play_arrow

• question_answer211)
  One of the most frequently used techniques in DNA fingerprinting is
  A)
  VNTR done clear
  B)
  SSCP done clear
  C)
  SCAR done clear
  D)
  AFLP done clear
  View Solution play_arrow

• question_answer212)
  In an inducible operon, the genes are
  A)
  usually not expressed unless a signal turns them "on". done clear
  B)
  usually expressed unless a signal turns them "off". done clear
  C)
  never expressed done clear
  D)
  always expressed done clear
  View Solution play_arrow

• question_answer213)
  Satellite RNAs are present in some
  A)
  viroids done clear
  B)
  prions done clear
  C)
  bacteriophages done clear
  D)
  plant viruses. done clear
  View Solution play_arrow

• question_answer214)
  The most unstable RNA is
  A)
  messenger RNA done clear
  B)
  soluble RNA done clear
  C)
  ribosomal RNA done clear
  D)
  heterogeneous nuclear RNA done clear
  View Solution play_arrow

• question_answer215)
  The portion of a eukaryotic gene which is transcribed but not translated is
  A)
  exon done clear
  B)
  intron done clear
  C)
  cistron done clear
  D)
  codon done clear
  View Solution play_arrow

• question_answer216)

  Read the statements A and B and select the correct option.

  Statement A: Synthesis of mRNA takes place in 5' - 3' direction.

  Statement B: Reading of mRNA is always in 3' - 5' direction.

  A)
  Both the statements are wrong done clear
  B)
  Statement A is wrong, B is correct. done clear
  C)
  Statement B is wrong, A is correct. done clear
  D)
  Both the statements A and B are correct. done clear
  View Solution play_arrow

• question_answer217)
  Match the entries in Column - I with those of Column - II and choose the correct answer.

  	Column - I		Column - II
  [a]	Restriction endonucleses	(p)	Kohler and Milstein
  [b]	Polymerase chain reaction	(q)	Alee Jeffreys
  [c]	DNA fingerprinting	(r)	Arber
  [d]	Monoclonal antibodies	(s)	Karry Mullis

  A)
  p, q, r, s done clear
  B)
  q, r, s, p done clear
  C)
  r, s, q, p done clear
  D)
  r, s, p, q done clear
  View Solution play_arrow

• question_answer218)
  In one of the techniques of recombinant insulin production the genes for a and P polypeptides were inserted into the plasmid by the side of
  A)
  antibiotic resistance gene done clear
  B)
  lac z promoter gene done clear
  C)
  \[\beta \]-galactosidase gene done clear
  D)
  ori site done clear
  View Solution play_arrow

• question_answer219)
  Genes that are involved in turning on or off the transcription of a set of structural genes are called
  A)
  polymorphic genes done clear
  B)
  operator genes done clear
  C)
  represser genes done clear
  D)
  regulatory genes done clear
  View Solution play_arrow

• question_answer220)
  Which of the following takes place in DNA fingerprinting?
  A)
  A positive identification can be made done clear
  B)
  Multiple restriction enzyme digests generate unique fragments done clear
  C)
  The polymerase chain reaction amplifies between fewer DNA done clear
  D)
  The variability of repeated sequences between two restriction sites is evaluated done clear
  View Solution play_arrow

• question_answer221)
  Which one of the following is wrongly matched?
  A)
  Represser protein - Binds to operator to stop enzyme synthesis. done clear
  B)
  Operon - Structural genes, operator and promoter. done clear
  C)
  Transcription - Writing information from DNA to t-RNA. done clear
  D)
  Translation - Using information in ot-rna to make protein. done clear
  View Solution play_arrow

• question_answer222)
  Select the correct option from the followings :
  A)

  Direction of RNA synthesis	Direction of reading of the template DNA strand
  5' - 3'	5' - 3'

  done clear
  B)

  Direction of RNA synthesis	Direction of reading of the template DNA strand
  3' - 5'	3' - 5'

  done clear
  C)

  Direction of RNA synthesis	Direction of reading of the template DNA strand
  5' - 3'	3' - 5'

  done clear
  D)

  Direction of RNA synthesis	Direction of reading of the template DNA strand
  3' - 5'	5' - 3'

  done clear
  View Solution play_arrow

• question_answer223)
  Commonly used vectors for human genome sequencing are
  A)
  Expression Vectors done clear
  B)
  T/A Cloning Vectors done clear
  C)
  T-DNA done clear
  D)
  BAC and YAC done clear
  View Solution play_arrow

• question_answer224)

  Read the following statements and choose the correct option.

  I. RNA polymerase associates transiently with 'Rho' factor to initiate transcription.

  II. In bacteria, transcription and translation takes place in the same compartment.

  II. RNA polymerase I is responsible for transcription of tRNA

  III. When hnRNA undergoes capping process, adenylate residues are added at 3' end in a template independent manner

  V. hnRNA is the precursor of mRNA

  A)
  II only is correct done clear
  B)
  II, III and V only are correct done clear
  C)
  III and IV only are correct done clear
  D)
  II and V only are correct done clear
  View Solution play_arrow

• question_answer225)
  Choose the correct statement of the following :
  A)
  Haploid content of human DNA is \[4.6\times {{10}^{6}}\,\,bp\]. done clear
  B)
  A nitrogenous base is linked to pentose sugar through phosphodiester linkage done clear
  C)
  X-ray diffraction data of Maurice Wilkins and Rosalind Franklin was the basis of Watson and Crick's DNA model done clear
  D)
  DNA is an acidic substance was first identified by Watson and Crick done clear
  View Solution play_arrow

• question_answer226)
  Aminoacylation of tRNA is essential for
  A)
  Replication of RNA done clear
  B)
  Formation of peptide bond done clear
  C)
  splicing done clear
  D)
  Initiation of transcription done clear
  View Solution play_arrow

• question_answer227)
  Which site of the tRNA pairs through hydrogen bonding with the triplet codes on mRNA?
  A)
  Codon done clear
  B)
  5' end of tRNA done clear
  C)
  3' end of tRNA done clear
  D)
  Anticodon done clear
  View Solution play_arrow

• question_answer228)
  Find the wrongly matched pair :
  A)
  Har Gobind Khorana - synthesized RNA molecules chemically done clear
  B)
  George Gamow - codon is triplet done clear
  C)
  Meselson and Stahl - regulation of gene expression done clear
  D)
  Alee Jeffreys - DNA finger printing done clear
  View Solution play_arrow

• question_answer229)
  If an inheritable mutation is observed in a population at high frequency, it is referred as
  A)
  DNA polymorphism done clear
  B)
  expressed sequence tag done clear
  C)
  sequence annotation done clear
  D)
  linkage done clear
  View Solution play_arrow

• question_answer230)
  An eukaryote, RNA polymerase II transcribes
  A)
  hnRNA done clear
  B)
  18S rRNA done clear
  C)
  28S rNA done clear
  D)
  tRNA done clear
  View Solution play_arrow

• question_answer231)
  Which of the following events would occur in 'Lac operon' of E. coli when the growth medium has high concentration of lactose?
  A)
  The represser protein attaches to the promoter sequence and derepresses the operator done clear
  B)
  The structural genes fail to produce polycistronic mRNA done clear
  C)
  The inducer molecule binds to represser protein and RNA polymerase binds to promoter sequence done clear
  D)
  The represser protein binds to RNA polymerase and prevents translation done clear
  View Solution play_arrow

• question_answer232)

  Statement A: The primary transcript produced in eukaryotes is translated without undergoing any modification or processing.

  Statement B: The hnRNA in humans has exons and introns.

  A)
  Statement B is correct and statement A is wrong done clear
  B)
  Both the statements A and B are correct done clear
  C)
  Statement A is correct and statement B is wrong done clear
  D)
  Both the statements A and B are wrong done clear
  View Solution play_arrow

• question_answer233)

  Some of the steps of DNA fingerprinting are given below. Identify the correct sequence from the options given.

  I. Electrophoresis of DNA fragments

  II. Hybridisation with DNA probe

  III. Digestion of DNA by RENs

  IV. UT radiography

  V. Blotting of DNA fragments to nitrocellulose membrane

  A)
  III - I - II - V - IV done clear
  B)
  III - I - V - II - IV done clear
  C)
  I - V - III - II - IV done clear
  D)
  I - III - V - IV - II done clear
  View Solution play_arrow

• question_answer234)
  During the transcription, if nucleotide sequence of DNA strand being coded is ATACG, then the nucleotide sequence of mRNA would be
  A)
  UATGC done clear
  B)
  TATGC done clear
  C)
  UAUGC done clear
  D)
  TATGG done clear
  View Solution play_arrow

• question_answer235)
  The sequence of nucleotides AUGCUUCUC indicates that it is a segment of
  A)
  sense strand of DNA done clear
  B)
  anti sense strand of DNA done clear
  C)
  RNA strand done clear
  D)
  polypeptide chain done clear
  View Solution play_arrow

• question_answer236)
  In DNA fingerprinting technique, probe is used for hybridization of DNA fragments.
  A)
  double stranded RNA done clear
  B)
  double stranded non-radioactive DNA done clear
  C)
  single stranded radioactive DNA done clear
  D)
  single stranded radioactive RNA done clear
  View Solution play_arrow

• question_answer237)
  Of the total number of genes estimated in human genome, nearly 10 percent are contained in
  A)
  chromosome 11 done clear
  B)
  chromosome 21 done clear
  C)
  Y chromosome done clear
  D)
  chromosome 1 done clear
  View Solution play_arrow

• question_answer238)
  The technique of DNA finger printing relies on
  A)
  repetitive DNA done clear
  B)
  mini satellite DNA done clear
  C)
  Both [a] and [b] done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer239)
  In DNA finger printing, the process of DNA hybridization with the help of specific DNA probe is described as
  A)
  western blotting done clear
  B)
  northern blotting done clear
  C)
  southern blotting done clear
  D)
  all the above done clear
  View Solution play_arrow

• question_answer240)
  Heterogeneous nuclear RNA (hnRNA) is converted to mRNA by
  A)
  splicing done clear
  B)
  capping done clear
  C)
  tailing done clear
  D)
  all the above done clear
  View Solution play_arrow

• question_answer241)
  DNA polymerase that helps in DNA replication is of
  A)
  Two types done clear
  B)
  Three types done clear
  C)
  Four types done clear
  D)
  Only one type done clear
  View Solution play_arrow

• question_answer242)
  In bacterial DNA replication, synthesis starting from the site of origin of replication
  A)
  Involves RNA primers done clear
  B)
  Requires telomerase done clear
  C)
  Proceeds unidirectionally done clear
  D)
  Move bidirectionally done clear
  View Solution play_arrow

• question_answer243)
  Which one is mostly transcribed?
  A)
  Single copy of DNA sequence done clear
  B)
  Highly repetitive DNA sequence done clear
  C)
  Middle repetitive DNA sequence done clear
  D)
  Only RNA sequence done clear
  View Solution play_arrow

• question_answer244)
  During replication of a bacterial chromosome, DNA synthesis starts from a replication, origin site and :
  A)
  RNA primers are involved done clear
  B)
  In facilitated by telomerase done clear
  C)
  Moves in one direction of the site done clear
  D)
  Moves in bi-directional way done clear
  View Solution play_arrow

• question_answer245)
  During polynucleotide synthesis by the following enzymes, in which case elongation occurs in \[5'\to 3'\]direction ?
  A)
  DNA polymerase done clear
  B)
  RNA polymerase done clear
  C)
  Reverse transcriptase done clear
  D)
  All the above done clear
  View Solution play_arrow