Lac Operon Video Lessons

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Problem: The lac operon would produce the greatest amount of β-galactosidase whenA. both lactose and glucose are present.B. both lactose and glucose are absent.C. lactose is present but glucose is absent.D. lactose is absent but glucose is present.E. None of the above conditions would result in β-galactosidase production.

FREE Expert Solution

lac operon: synthesizes proteins for the metabolism of lactose (lac genes)

• when lactose and glucose are present, lac genes are not expressed

• when only lactose is present, lac genes are expressed


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Problem Details

The lac operon would produce the greatest amount of β-galactosidase when

A. both lactose and glucose are present.

B. both lactose and glucose are absent.

C. lactose is present but glucose is absent.

D. lactose is absent but glucose is present.

E. None of the above conditions would result in β-galactosidase production.

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