- 1(current)
Q. No.What radioactive isotope was used by Meselson and Stahl to label DNA in their experiment?
1. 35S
2. 15N
3. 32P
4. None
1. 35S
2. 15N
3. 32P
4. None
Subtopic: Â DNA Replication |
From NCERT
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If E.coli was allowed to grow for 80 minutes after transfer from 15N to 14N medium, the number of hybrid density DNA molecules would be:
| 1. | 2 | 2. | 16 |
| 3. | 14 | 4. | 8 |
Subtopic: Â DNA Replication |
 63%
From NCERT
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DNA replication is correctly described as:
| 1. | Semi-conservative and Continuous |
| 2. | Semi-conservative and Discontinuous |
| 3. | Conservative and Continuous |
| 4. | Semi-conservative and Semi-discontinuous |
Subtopic: Â DNA Replication |
 58%
From NCERT
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The discontinuously synthesized DNA fragments are later joined by:
| 1. | DNA helicase | 2. | Topoisomerase |
| 3. | DNA ligase | 4. | DNA polymerase |
Subtopic: Â DNA Replication |
 94%
From NCERT
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Which of the following is true for both transcription and DNA replication?
| 1. | The principle of complementarity governs the processes |
| 2. | Only if the two strands act as a template |
| 3. | Only a segment of both strands is involved |
| 4. | Adenine base pairs with thymine |
Subtopic: Â DNA Replication |Â Transcription |
 80%
From NCERT
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During DNA replication, Okazaki fragments are used to elongate:
| 1. | The lagging strand towards the replication fork. |
| 2. | The leading strand away from the replication fork. |
| 3. | The lagging strand away from the replication fork. |
| 4. | The leading strand towards the replication fork. |
Subtopic: Â DNA Replication:III |Â DNA Replication |
 76%
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- 1(current)
Q. No.
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