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

done Assertion and Reason - Molecular Basis of Inheritance Total Questions - 21

• question_answer1)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] DNA acts as a genetic material in all organisms.

  Reason [R] It is a double-stranded biomolecule in most organisms.

  A)
  Both A and Rare true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer2)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] S. pneumoniae produce two types of colonies, vi smooth and rough.

  Reason [R] S-type bacteria form smooth colony due to the absence of polysaccharide coat.

  A)
  Both A and Rare true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer3)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] DNA has two chains having antiparallel polarity.

  Reason [R] In one chain of DNA at one end has a free phosphate moiety 3 end of ribose sugar and at other end the ribose has a free 3' OH group.

  A)
  Both A and Rare true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer4)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Adenine cannot pair with cytosine.

  Reason [R] Adenine and cytosine do not have complementarity between their respective hydrogen donor and hydrogen acceptor sites.

  A)
  Both A and Rare true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer5)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Histones are basic in nature.

  Reason [R] These are rich in the amino acids lysine and arginine.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer6)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Heterochromatin is transcriptionally inactive.

  Reason [R] It is densely packed.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer7)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Viruses having RNA genome and shorter lifespan, mutate and evolve faster.

  Reason [R] RNA is unstable and thus mutates faster.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer8)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Replication on one strand of DNA is continuous and on another it is discontinuous.

  Reason [R] The DNA polymerase works in 3' \[\to \] 5' direction

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer9)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Replication and transcription occur in the nucleus, but translation takes place in the cytoplasm.

  Reason [R] mRNA is transferred from the nucleus into cytoplasm where ribosomes and amino acids are available for protein synthesis.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer10)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] hnRNA is larger than mRNA.

  Reason [R] hnRNA has non-coding introns which are pot required for translation.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer11)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Primary transcript contains only coding sequences.

  Reason [R] Introns are non-coding sequences in eukaryotes.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer12)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Polycistroric mRNA is capable of forming a number of different polypeptide chains.

  Reason [R] Polycistronic mRNA has terminator codons.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer13)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] In transcription, the strand with 3' \[\to \] 5' polarity acts as the template strand.

  Reason [R] The enzyme RNA polymerase catalyses the polymerisation in only one direction, i.e. 3 \[\to \] 3'.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer14)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] In eukaryotes, transcription occurs in nucleus.

  Reason [R] In bacteria, transcription and translation occur in cytoplasm.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
  View Solution play_arrow

• question_answer15)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] The genetic code is degenerate.

  Reason [R] Most amino acids are coded by more than one codon.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer16)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] mRNA has some untranslated regions that are not translated.

  Reason [R] UTRs are required for efficient translation.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer17)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Anticodon binds with codon by hydrogen bonds.

  Reason [R] During translation, ribosomes move over wRNA, so that all codons on wRNA are exposed.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer18)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] fRNA recognises its corresponding codon in mRNA.

  Reason [R] For each codon, there is an individual RNA.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer19)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Polyribosomes are formed during active protein synthesis.

  Reason [R] Different ribosomes of polyribosomes are connected with RNA.

   
  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer20)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] Structural genes produce mRNA when operator gene is turned on by an inducer.

  Reason [R] Promoter gene base sequence determines which strand of DNA acts as template.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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• question_answer21)

  Direction: Each of these questions contains two statements

  Assertion [A] and Reason [R]. Each of these questions also has four alternative choices, any one of which is the correct answer. You have to select one of the codes [a], [b], [c] and [d] given below.

  Assertion [A] DNA fingerprinting is very well-known for its application in paternity testing in case of disputes.

  Reason [R] It employs the principle of DNA polymorphism.

  A)
  Both A and R are true and R is the correct explanation of A done clear
  B)
  Both A and R are true, but R is not the correct explanation of A done clear
  C)
  A is true, but R is false done clear
  D)
  A is false, but R is true done clear
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