Part A. Line (a) A. The repressor is inactive, and CAP is bound to its binding s

Question

Part A.

Line (a)

A. The repressor is inactive, and CAP is bound to its binding site. The operon is being transcribed at a high level.

B. The repressor is inactive, and CAP is not bound to its binding site. The operon is transcribed at a low level.

C. The repressor is bound to the operator, and CAP is bound to its binding site. The operon is not transcribed.

D. The repressor is bound to the operator, and CAP is not bound to its binding site. The operon is not transcribed.

Part B.

Line (b)

Options: A, B, C & D the same

Part C.

Line (c)

Answer Options: A, B, C & D the same

Part D.

Line (d)

Answer Options: A, B, C & D the same

Predict the level of genetic activity of the lac operon as well as the status of the lac repressor and the CAP protein under the cellular conditions listed in the accompanying table Line Lactose Glucose

Explanation / Answer

Part A:

D. The repressor is bound to the operator, and CAP is not bound to its binding site. The operon is not transcribed.

Part B:

A. The repressor is inactive, and CAP is bound to its binding site. The operon is being transcribed at a high level.

Part C:

D. The repressor is bound to the operator, and CAP is not bound to its binding site. The operon is not transcribed.

Part D:

B. The repressor is inactive, and CAP is not bound to its binding site. The operon is transcribed at a low level.

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