whether the sugars lactose and glucose are present in the environment. In the fo

Question

whether the sugars lactose and glucose are present in the environment. In the following diagram, complete the missing information describing the expression level of the lac genes when lactose is absent and glucose is The lac genes encode proteins that aid in lactose absorption and digestion. Expression of the lac genes depends on RNA polymerase? ? bind to the promoter, so expression of lac genes cannot RNA polymerase binding site If glucose is present, then CAMP levels are molecules are active when lactose is absent. and CAP molecules are Elsewhere in the E. coli chromosome les the laci gene, which encodes the Lac repressor protein. Imagine that you O Type here to search DOLL P10 F11P12 A?& awE R T Y JKL

Explanation / Answer

RNA polymerase can not bind to the promoter, so the expression of lac genes does not occur.

If glucose is present, then cAMPs levels are low and CAP molecules are inactive.

lac repressor molecules are active when lactose is absent.

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