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Q. No.
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.
Subtopic: Search for Genetic Material |
77%
Level 2: 60%+
Hints
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: Translation |
83%
Level 1: 80%+
Hints
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: Gene Regulation: Introduction | Gene Regulation: Lac Operon |
80%
Level 1: 80%+
Hints
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: Human Genome Project |
75%
Level 2: 60%+
Hints
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: Gene Regulation: Lac Operon |
81%
Level 1: 80%+
Hints
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: DNA Replication | Transcription |
58%
Level 3: 35%-60%
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Hints
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The ‘beads-on-string’ is the description used for the structure of:
| 1. | nucleolus in a nucleus |
| 2. | heterochromatic inactivated X chromosome in females |
| 3. | nucleosome in chromatin |
| 4. | tetrad of paired homologs in first meiosis |
Subtopic: DNA Packaging |
95%
Level 1: 80%+
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Hints
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Consider the two statements:
| Statement I: | The negatively charged DNA is wrapped around the positively charged histone octamer to form a structure called a nucleosome. |
| Statement II: | A typical nucleosome contains 200 bp of DNA helix. |
| 1. | Statement I is incorrect; Statement II is correct |
| 2. | Statement I is correct; Statement II is correct |
| 3. | Statement I is correct; Statement II is incorrect |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: DNA Packaging |
92%
Level 1: 80%+
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Consider the given statements:
| Assertion (A): | On one strand the replication of DNA is continuous, while on the other, it is discontinuous. |
| Reason (R): | The discontinuously synthesised fragments are later joined by the enzyme DNA ligase. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: DNA Replication |
82%
Level 1: 80%+
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The mRNA codons for glutamic acid and valine can respectively be:
1. UAG and UGA
2. UUU and GGG
3. GAG and GUG
4. AUG and UAC
1. UAG and UGA
2. UUU and GGG
3. GAG and GUG
4. AUG and UAC
Subtopic: Search for Genetic Material:I | Search for Genetic Material: II | DNA Replication: I | DNA Replication: II | DNA Replication:III | Solved Problems | Transcription: I | Transcription:II | Transcription: III | Transcription: IV |
87%
Level 1: 80%+
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