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Q. No.Assertion(A): A permutation combination of 4 to the power 3 (4 × 4 × 4) would generate 64 codons.
Reason(R): In order to code for all the 20 amino acids, the code should be made up of three nucleotides.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Genetic Code: I |
Level 3: 35%-60%
Hints
Assertion(A): The amino acids have no structural specialties to read the code uniquely.
Reason(R): Crick postulated the presence of an adapter molecule in translation.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): Crick postulated the presence of an adapter molecule in translation.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Translation |
58%
Level 3: 35%-60%
Hints
| Assertion (A): | Some specific sequences in DNA are called repetitive sequences which made the basis for DNA fingerprinting. |
| Reason (R): | A small stretch of DNA is repeated many times in these specific sequences. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, but (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | (A) is False, but (R) is True. |
Subtopic: DNA Fingerprinting |
51%
Level 3: 35%-60%
Hints
Assertion(A): The genetic implications of the structure of DNA became very clear.
Reason(R): The process of DNA synthesis follows principle of complementarity.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): The process of DNA synthesis follows principle of complementarity.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: DNA Double Helix |
60%
Level 2: 60%+
Hints
Assertion(A): S strain bacteria produce smooth shiny colonies.
Reason(R): S strain bacteria produce mucous (polysaccharide) coat.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): S strain bacteria produce mucous (polysaccharide) coat.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Search for Genetic Material |
86%
Level 1: 80%+
Hints
| Assertion (A): | Viruses grown in the presence of radioactive phosphorus contained radioactive DNA but not radioactive protein. |
| Reason(R): | Protein contains phosphorus but DNA does not. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True, but (R) is not the correct explanation of (A). |
| 3. | (A) is True, but (R) is False. |
| 4. | (A) is False, but (R) is True. |
Subtopic: Search for Genetic Material |
86%
Level 1: 80%+
Hints
Assertion(A): Repetitive sequences have become very useful identification tools in forensic applications.
Reason(R): DNA from every tissue from an individual show the different degree of polymorphism.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): DNA from every tissue from an individual show the different degree of polymorphism.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: DNA Fingerprinting |
59%
Level 3: 35%-60%
Hints
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Assertion(A): 20 amino acids have to be coded by the combination of four bases.
Reason(R): Each nucleic acid has four types of bases.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): Each nucleic acid has four types of bases.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Genetic Code |
Level 3: 35%-60%
Hints
Assertion(A): Transcription and translation occur in the same compartment in bacteria.
Reason(R): Translation begins much before transcription ends in bacteria.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): Translation begins much before transcription ends in bacteria.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Transcription |
60%
Level 2: 60%+
Hints
Assertion(A): The strand that has the polarity 3'→5' acts as a template.
Reason(R): DNA-dependent RNA polymerase catalyses the polymerisation in only one direction, that is, 3'→5'
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): DNA-dependent RNA polymerase catalyses the polymerisation in only one direction, that is, 3'→5'
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: DNA Double Helix |
77%
Level 2: 60%+
Hints
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