Contrast negative and positive regulation in the lac operon. Which of the follow

Question

Contrast negative and positive regulation in the lac operon. Which of the following statements are true? (You can select more than one correct answer.)

A. The CAP is an example of positive regulation because it blocks the repressor, thereby allowing transcription.
B. The repressor is an example of negative regulation because it blocks the Polymerase from transcribing the operon.
C. The CAP is an example of negative regulation because it blocks the repressor.

D. The CAP is an example of positive regulation because it induces the RNA Polymerase to bind the promoter.
E. The repressor is an example of negative regulation because it blocks lactose from binding the operator.

Any help or explanations would be much appreciated, thank you!

Explanation / Answer

The repressor is an example of negative regulation because it blocks the Polymerase from transcribing the operon. This statement is true about negative regulation of Lac operon.

The CAP is an example of positive regulation because it induces the RNA Polymerase to bind the promoter. This statement is true about positive regulation of Lac operon.

Therefore, Options B and D arecorrect.

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