Assertion(A): There is a need to regulate transcription and translation.
Reason(R): Transcription and translation are energetically very expensive processes.
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: Â Translation |
 61%
From NCERT
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Assertion(A): If the sequence of bases in one strand is known then the sequence in another strand can be predicted.
Reason(R): These strands run antiparallel to each other.
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): These strands run antiparallel to each other.
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: Â DNA Double Helix |
 59%
From NCERT
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Assertion(A): DNA is the genetic material.
Reason(R): Bacteria which was infected with viruses that had radioactive DNA were found to be radioactive in Hershey and Chase experiment.
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): Bacteria which was infected with viruses that had radioactive DNA were found to be radioactive in Hershey and Chase experiment.
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: Â Search for Genetic Material |
 76%
From NCERT
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Assertion(A): Aminoacylation of tRNA requires energy.
Reason(R): Formation of a peptide bond does not require energy.
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): Formation of a peptide bond does not require energy.
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: Â Translation |
 82%
From NCERT
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Assertion(A): It is the metabolic, physiological, or environmental conditions that regulate the expression of genes.
Reason(R): In the absence of lactose, the beta-galactosidase enzyme is synthesized by E. coli.
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): In the absence of lactose, the beta-galactosidase enzyme is synthesized by E. coli.
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: Â Gene Regulation: Introduction |Â Gene Regulation: Lac Operon |
 78%
From NCERT
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Assertion(A): Specialised computer-based programs were developed for Sanger's sequencing method.
Reason(R): Alignment of overlapping fragments was not possible humanly.
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): Alignment of overlapping fragments was not possible humanly.
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: Â Human Genome Project |
 73%
From NCERT
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Assertion(A): Lac operon regulation is a kind of regulation of enzyme synthesis by its substrate.
Reason(R): Lac operon is regulated by the presence of glucose in the medium which acts as an inducer.
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): Lac operon is regulated by the presence of glucose in the medium which acts as an inducer.
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: Â Gene Regulation: Lac Operon |
 80%
From NCERT
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Assertion (A): DNA polymerase II fills the gap that is left after the removal of RNA primers during DNA replication.
Reason (R): In eukaryotes RNA polymerase I transcribesrRNA, hnRNA and t-RNA.
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. Both (A) and (R) are false.
Reason (R): In eukaryotes RNA polymerase I transcribesrRNA, hnRNA and t-RNA.
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. Both (A) and (R) are false.
Subtopic: Â DNA Replication |Â Transcription |
 52%
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Assertion (A): Both the strands DNA are not copied during transcription.
Reason (R): The two RNA molecules if produced simultaneously would be complementary to each other, hence would form a double stranded RNA which would prevent RNA from being translated into protein.
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. Both (A) and (R) are false.
Reason (R): The two RNA molecules if produced simultaneously would be complementary to each other, hence would form a double stranded RNA which would prevent RNA from being translated into protein.
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. Both (A) and (R) are false.
Subtopic: Â Transcription |
 83%
From NCERT
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Assertion (A): The split gene arrangement represents probably the ancient feature of genome.
Reason (R): The process of splicing represents the dominance of RNA world
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. Both (A) and (R) are false.
Reason (R): The process of splicing represents the dominance of RNA world
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. Both (A) and (R) are false.
Subtopic: Â Transcription |
 68%
From NCERT
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