Question: The role of a metabolite that controls an inducible operon is to A. bind to the promoter r...

Question: The role of a metabolite that controls an inducible operon is
to

bind to the promoter r…

The role of a metabolite that controls an inducible operon is
to

	A.	bind to the promoter region and decrease the affinity of RNA polymerase for the promoter.
	B.	bind to the operator region and block the attachment of RNA polymerase to the promoter.
	C.	increase the production of inactive repressor proteins.
	D.	bind to the repressor protein and inactivate it.

How is glucose involved in the catabolite repression of the
lactose operon?

	A.	It has nothing to do with regulation of the lactose operon.
	B.	It results in decreased cAMP levels, which in turn leads to decreased CRP binding; thus the lac operon is repressed even if lactose is present along with the glucose.
	C.	It is also a substrate for β-galactosidase and thus competes with lactose for this enzyme.
		.
	E.	It interacts with inactive repressor to allow operator binding and little or no transcription.