- 1(current)
Q. No.
The repressor of the lac operon is:
| 1. | Lactose itself | 2. | A steroid |
| 3. | Synthesized constitutively | 4. | A product of structural gene |
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A very low level of expression of the lac operon has to be present in the cell:
| 1. | When lactose is present | 2. | When lactose is absent |
| 3. | When glucose is absent | 4. | All the time |
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Consider the following statements:
| I: | In prokaryotes, control of the rate of transcriptional initiation is the predominant site for control of gene expression. |
| II: | Regulation of lac operon by CAP is referred to as negative regulation. |
| III: | The inducer of the lac operon is lactose. |
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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- 1(current)
Q. No.
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