Maximal transcription of the lac operon requires the presence of high levels of glucose the presence of high levels of glucose A the removal of the operator region of the operon the removal of the operator region of the operon B the presence of cyclic AMP and lactose the presence of cyclic AMP and lactose C the activation of the repressor protein

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03-05-2021
Biology

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Maximal transcription of the lac operon requires the presence of high levels of glucose the presence of high levels of glucose A the removal of the operator region of the operon the removal of the operator region of the operon B the presence of cyclic AMP and lactose the presence of cyclic AMP and lactose C the activation of the repressor protein

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ahsan57900 ahsan57900 · Answer 1 · 2021-05-05T10:54:02-04:00

Answer:

B. the presence of cyclic AMP and lactose

Explanation:

Maximal transcription of the lac operon requires the presence of cyclic AMP and lactose. Cyclic AMP/CRP complex attached to a specific sequence in the lac control region. This region is known as the "CAP" site. Mutations that occurs in the CAP site prevent cyclic AMP-CRP binding which also prevent high levels of expression of the lac operon. The lac repressor and catabolite activator protein (CAP) are the two regulators that is responsible for turn on and off the operon in response to lactose and glucose levels.

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