-
question_answer1)
A ribose (but not deoxyribose) nucleotide is [CPMT 1987; Kerala PMT 2004]
A)
Cytosine - pentose sugar - phosphate done
clear
B)
Guanine - pentose sugar - phosphate done
clear
C)
Thymine - pentose sugar - phosphate done
clear
D)
Uracil - pentose sugar - phosphate done
clear
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question_answer2)
DNA is present in [MP PMT 1995, 98; BVP 2000; RPMT 2001; MHCET 2001]
A)
Nucleus only done
clear
B)
Mitochondrion only done
clear
C)
Chloroplast only done
clear
D)
All the above done
clear
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question_answer3)
Which one of the following pairs is not correctly matched [MP PMT 1993]
A)
Recombinant DNA DNA formed by the joining of segments of DNA from different sources done
clear
B)
Purine Nitrogenous bases Cytosine, thymine and uracil done
clear
C)
ATP The principal energy carrying compound in the cell done
clear
D)
r-RNA RNA molecules found in ribosomes done
clear
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question_answer4)
Hydrolysis of nucleic acid yields [AMU 1988]
A)
Only sugar done
clear
B)
Phosphoric acid only done
clear
C)
Nitrogenous base only done
clear
D)
All the above done
clear
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question_answer5)
DNA differs from RNA [BHU 2003]
A)
In the nature of sugar alone done
clear
B)
In the nature of purines alone done
clear
C)
In the nature of sugar and pyrimidines done
clear
D)
None of the above done
clear
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question_answer6)
Which of the following is a purine [MP PMT 1999]
A)
Prokaryotes done
clear
B)
Guanine done
clear
C)
Thymine done
clear
D)
Uracil done
clear
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question_answer7)
ATP is [Orissa PMT 2002]
A)
Adenosine D-ribose three phosphate done
clear
B)
Adenosine L-ribose three phosphate done
clear
C)
Adenine D-ribose three phosphate done
clear
D)
Adenine L-ribose three phosphate done
clear
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question_answer8)
ATP is [BVP 2002]
A)
Nucleotide done
clear
B)
Nucleoside done
clear
C)
Nucleic acid done
clear
D)
Hormone done
clear
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question_answer9)
Thymine is a [DPMT 1991]
A)
Enzyme done
clear
B)
Vitamin done
clear
C)
Pyrimidine done
clear
D)
Purine done
clear
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question_answer10)
Who proved that DNA is a genetic material
A)
Jacob and Monad done
clear
B)
Avery, Mcleod and McCarthy done
clear
C)
Griffith done
clear
D)
Harshey and Chase done
clear
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question_answer11)
DNA is concentrated in [CPMT 1979, 86]
A)
Chromatin as DNA protein complex done
clear
B)
Ribosomes done
clear
C)
Golgi bodies done
clear
D)
Plastids done
clear
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question_answer12)
Strands of DNA are bonded by [CPMT 1980; AIIMS 1989; Bihar MDAT 1992]
A)
Hydrogen done
clear
B)
Carbon done
clear
C)
Oxygen done
clear
D)
Nitrogen done
clear
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question_answer13)
RNA contains [KCET 1994; BVP 2000; CPMT 2003]
A)
Hexose sugar done
clear
B)
Deoxyribose sugar done
clear
C)
Dextrose sugar done
clear
D)
Ribose sugar done
clear
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question_answer14)
A DNA strand is directly involved in the synthesis of following except
A)
Another DNA done
clear
B)
Protein synthesis done
clear
C)
tRNA molecule done
clear
D)
mRNA molecule done
clear
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question_answer15)
In DNA guanine pairs with [CPMT 1980; AFMC 1988]
A)
Cytosine done
clear
B)
Thymine done
clear
C)
Uracil done
clear
D)
Adenine done
clear
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question_answer16)
DNA is not present in one of the following [DPMT 1983; MP PMT 2003]
A)
Mitochondria done
clear
B)
Chloroplast done
clear
C)
Bacteriophage done
clear
D)
Tobacco mosaic virus done
clear
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question_answer17)
DNA strands are antiparallel because of the presence of [Kerala PMT 2004]
A)
H-bonds done
clear
B)
Peptide bonds done
clear
C)
Disulfied bonds done
clear
D)
Phosphate-diester bonds None of the above done
clear
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question_answer18)
Pyrimidines are
A)
Single ring compounds done
clear
B)
Double ring compounds done
clear
C)
Three ring compounds done
clear
D)
None of the above done
clear
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question_answer19)
The function of histone proteins of nuclei is
A)
To provide amino acids for enzyme synthesis done
clear
B)
To provide structural proteins for stabilising chromosome structure done
clear
C)
To neutralise anionic charges of inter nucleotide phosphate in DNA done
clear
D)
Both (b) and (c) done
clear
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question_answer20)
Nucleic acids were discovered by [MP PMT 1999]
A)
Watson and Crick done
clear
B)
Khorana done
clear
C)
Wilkins done
clear
D)
Miescher done
clear
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question_answer21)
In DNA molecule, which of the following base pair is present [MP PMT 1992; CPMT 1991; BHU 1980]
A)
Cytosine and adenine done
clear
B)
Adenine and thymine done
clear
C)
Adenine and guanine done
clear
D)
Cytosine and thymine done
clear
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question_answer22)
DNA is not found in [CPMT 1987]
A)
Chromatin done
clear
B)
Nucleus done
clear
C)
Nucleolus done
clear
D)
Cytoplasm done
clear
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question_answer23)
The transformation experiments on Pneumococcus showed that [CPMT 1988]
A)
DNA can duplicate itself done
clear
B)
RNA is the genetic material done
clear
C)
DNA is the genetic material done
clear
D)
None of these done
clear
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question_answer24)
The base pairs of DNA are correctly shown as [Bihar MDAT 1995; RPMT 1997; BHU 1998, 99, 2004; BVP 2000; MHCET 2003]
A)
A - T and C = G done
clear
B)
A = T and C = G done
clear
C)
A = T and C - G done
clear
D)
A - T and C - G done
clear
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question_answer25)
Pentose sugar present in nucleic acid is
A)
Ribulose done
clear
B)
Ribose done
clear
C)
Raffinose done
clear
D)
Xylulose done
clear
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question_answer26)
Purines are
A)
Single ring compounds done
clear
B)
Double ring compounds done
clear
C)
Straight chain compounds done
clear
D)
None of the above done
clear
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question_answer27)
DNA is [CPMT 1980]
A)
Always double stranded done
clear
B)
Rarely single stranded done
clear
C)
Always single stranded done
clear
D)
Rarely double stranded done
clear
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question_answer28)
Which of the following is capable of self-replication [CPMT 1988]
A)
An enzyme done
clear
B)
A carbohydrate molecule done
clear
C)
A water molecule done
clear
D)
A nucleic acid done
clear
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question_answer29)
DNA was first discovered by [CPMT 1979, 94; BHU 1985]
A)
Beadle and Tatum done
clear
B)
Watson and Crick done
clear
C)
Friedrich Miescher done
clear
D)
Kornberg done
clear
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question_answer30)
Ultraviolet light absorbed by nucleic acid is [RPMT 2000]
A)
26 nm done
clear
B)
75 nm done
clear
C)
260 nm done
clear
D)
1500 nm done
clear
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question_answer31)
The length of DNA having 23 base pairs is [Kerala PMT 2004]
A)
\[\text{70}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
B)
\[\text{78}\text{.4}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
C)
\[\text{78}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
D)
\[\text{74}\text{.8}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
E)
\[\text{74}\text{.2}\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
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question_answer32)
The nucleic acid base having two possible binding sites is [AIIMS 2004]
A)
Thymine done
clear
B)
Cytosine done
clear
C)
Guanine done
clear
D)
Adenine done
clear
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question_answer33)
Five nitrogen atoms are present in the ring of
A)
Uracil done
clear
B)
Guanine done
clear
C)
Cytosine done
clear
D)
Thymine done
clear
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question_answer34)
The strongest evidence that DNA is genetic material comes from
A)
That chromosomes are made up of DNA done
clear
B)
Transformation of bacterial cells done
clear
C)
That DNA is not present in the cytoplasm done
clear
D)
That DNA is present in the nucleus done
clear
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question_answer35)
The distance between two nucleotides in DNA helix is
A)
\[\text{5}\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
B)
\[\text{3}\text{.4}\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
C)
\[\text{3}\text{.9}\overset{\text{o}}{\mathop{\text{A}}}\,\] done
clear
D)
\[30\overset{o}{\mathop{A}}\,\] done
clear
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question_answer36)
A nucleoside differs from a nucleotide in not having [MP PMT 1998; BVP 2002]
A)
Phosphate done
clear
B)
Sugar done
clear
C)
Phosphate and sugar done
clear
D)
Nitrogen base done
clear
View Solution play_arrow
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question_answer37)
How many nucleotides are present in one turn of DNA helix [MP PMT 1999, 2000; Haryana PMT 2005]
A)
4 pairs done
clear
B)
8 pairs done
clear
C)
10 pairs done
clear
D)
9 pairs done
clear
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question_answer38)
The similarity between DNA and RNA is that both are [KCET 1999]
A)
Double stranded done
clear
B)
Having similar sugars done
clear
C)
Polymers of nucleotides done
clear
D)
Having similar pyrimidines done
clear
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question_answer39)
DNA is a polymer of [CPMT 1998; BVP 2000]
A)
Nucleotide done
clear
B)
Nucleoside done
clear
C)
Amino acids done
clear
D)
All of the above done
clear
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question_answer40)
How many types of nucleotides are commonly found
A)
One done
clear
B)
Two done
clear
C)
Three done
clear
D)
Four done
clear
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question_answer41)
Nucleoside is made up of [BHU 1995; Pb. PMT 2004]
A)
Sugar only done
clear
B)
Phosphate only done
clear
C)
Sugar and phosphate done
clear
D)
Sugar and base done
clear
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question_answer42)
Which of the cell organelles are devoid of deoxy ribonucleic acid [RPMT 1997]
A)
Mitochondria and nucleus done
clear
B)
Chloroplast and mitochondria done
clear
C)
Nucleus and chloroplast done
clear
D)
Lysosome and dictyosome done
clear
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question_answer43)
Which one of the following is widely distributed in a cell [CPMT 1977; MHCET 2000]
A)
DNA done
clear
B)
RNA done
clear
C)
Chloroplast done
clear
D)
Chromoplast done
clear
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question_answer44)
RNA is absent in [BHU 1980; MP PMT 1986; MHCET 2003]
A)
Plasmalemma done
clear
B)
Cytoplasm done
clear
C)
Chromosomes done
clear
D)
Ribosomes done
clear
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question_answer45)
Which of the following bases is present in RNA in place of thymine [CPMT 1986; Orissa JEE 2004]
A)
Uracil done
clear
B)
Adenine done
clear
C)
Guanine done
clear
D)
Water done
clear
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