- 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 |
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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 |
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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 |
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The discontinuously synthesized DNA fragments are later joined by:
| 1. | DNA helicase | 2. | Topoisomerase |
| 3. | DNA ligase | 4. | DNA polymerase |
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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 |
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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. |
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- 1(current)
Q. No.
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