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Q. No.If a molecule that can act as a genetic material should be able to generate its replica, which of the following molecules can act as a genetic material?
I. Proteins
II. DNA
III. RNA
1.
Only I and II
2.
Only I and III
3.
Only II and III
4.
I, II and III
Subtopic: DNA vs RNA as Genetic Material |
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The untranslated regions:
| I: | are present at only the 5’ end of the mature mRNA in eukaryotes |
| II: | are not required during translation and hence are spliced out of the mature mRNA |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Translation |
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In an operon:
| I: | a polycistronic structural gene is regulated by a common promoter and regulatory genes |
| II: | the regulation is always negative and inducible |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Gene Regulation: Lac Operon |
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During post-transcriptional modification of hnRNA in eukaryotes:
| I: | Capping is done at the 5’ end and tailing at the 3’ end |
| II: | Exons are removed from the split gene to form the cistron |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Transcription: I |
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Consider the given statements:
| I: | Griffith discovered the process of bacterial transformation. |
| II: | Hershey and Chase unequivocally proved that DNA is the genetic material. |
| III: | Meselson and Stahl showed that DNA replicated semi-conservatively. |
| 1. | Only I and II are correct |
| 2. | Only I and III are correct |
| 3. | Only II and III are correct |
| 4. | I, II and III are correct |
Subtopic: DNA Replication | Search for Genetic Material |
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You start with 15N15N (heavy) DNA of E.coli. After TWO generations in the 14N medium, you expect E. coli cells will contain:
| 1. | 25% 15N15N DNA, 50% 15N14N DNA, and 25% 14N14N DNA. |
| 2. | 50% 15N15N DNA and 50% 14N14N DNA. |
| 3. | 50% 15N15N DNA and 50% 15N14N DNA. |
| 4. | 50% 15N14N DNA and 50% 14N14N DNA. |
Subtopic: DNA Replication |
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| Assertion (A): | VNTRs are the basis of DNA fingerprinting by RFLP |
| Reason (R): | VNTRs are polymorphic and are inherited |
| 1. | Both (A) and (R) are True and the (R) is the correct explanation of the (A) |
| 2. | Both (A) and (R) are True but the (R) is not the correct explanation of the (A) |
| 3. | (A) is True but (R) is false |
| 4. | Both (A) and (R) are False |
Subtopic: DNA Fingerprinting |
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The molecule shown in the given figure:
| I. | serve as substrate for DNA replication |
| II. | provide energy for polymerisation reaction |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: DNA Replication: I |
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In Hershey and Chase experiment:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Radioactive sulfur-35 was used to label the DNA contained in the T2 phage |
| II: | Radioactive phosphorus-32 was used to label the protein sections of the T2 phage |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Search for Genetic Material |
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Consider the two statements:
I. Transcripts of eukaryotic genes cannot be translated by bacteria.
II. Eukaryotic genes contain introns.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
I. Transcripts of eukaryotic genes cannot be translated by bacteria.
II. Eukaryotic genes contain introns.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. Both I and II are incorrect
Subtopic: Transcription |
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