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You Are Studying Regulation of a Prokaryotic Operon

Question 29

Multiple Choice

You are studying regulation of a prokaryotic operon.Experiments show that expression of the operon is increased when levels of biosynthetic product from that pathway are low.Based on this information,what is a likely mode of regulation?


A) The product binds a repressor,allowing it to bind the operator.
B) The product binds an activator,helping RNA polymerase to bind the promoter.
C) The product binds a repressor,preventing it from binding the operator.
D) The product binds to the biosynthetic enzymes,blocking them directly.

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