Q. No.| Assertion (A): | It is necessary to define the boundaries that would demarcate the region and the strand of DNA that would be transcribed. |
| Reason (R): | Reason: Both strands of DNA are not copied during transcription. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are false. |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
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| Assertion (A): | Both the strands of DNA are not copied during transcription. |
| Reason (R): | Both strands of DNA are identical in their base composition. |
| 1. | (A) is true but (R) is false. |
| 2. | Both (A) and (R) are false. |
| 3. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 4. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
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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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DNA-dependent RNA polymerase catalyzes polymerization in:
| 1. | Only in 3’ – 5’ direction |
| 2. | Only in 5’ – 3’ direction |
| 3. | In both directions |
| 4. | In neither directions |
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Consider the transcription unit given in the following diagram and choose the correct statements:
| I: | The promoter on the template is situated upstream and 5’ to the structural gene. |
| II: | It is the presence of the structural gene that defines the template strand. |
| III: | The coding strand does not code for anything and is displaced during transcription. |
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II and III |
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| Assertion (A): | In transcription, the strand that does not code for anything is referred to as the coding strand. |
| Reason (R): | It is the presence of the promoter in a transcription unit that defines the template and coding strands. |
| 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. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
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Consider the following statements:
| I: | All the reference point while defining a transcription unit is made with the coding strand. |
| II: | It is the presence of a promoter in a transcription unit that also defines the template and coding strands. |
| III: | Exons are said to be sequences that do not appear in mature or processed RNA. |
Which of the above statements are true?
| 1. | I and II only | 2. | I and III only |
| 3. | II and III only | 4. | I, II, and III |
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A segment of DNA coding for a polypeptide is most accurately defined as:
| 1. | Operon | 2. | Gene |
| 3. | Recon | 4. | Cistron |
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Which of the following helps in the termination of transcription?
| 1. | Sigma factor | 2. | Translocase |
| 3. | Ubiquitin | 4. | Rho factor |
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