What is the benfits of the repressor being constitutively produced? A. the repre

Question

What is the benfits of the repressor being constitutively produced?

A. the repressor provides a feedback loop preventing the lac operon from being transcribed in the absence of glucose

B. the bacteria does not want to expand energy creating lactose metabolizing enzymes if lactose is not available

C. the repressor acts as a lactose sensor, and recruits RNA polymerase only in the presence of lactose

D. the operator needs either a constitutively expressed activator or repressor binding to it to regulate transcription

Explanation / Answer

Ans will be C.

If we look at the options,all seems to be true but the most important is the function of repressor as a lactose sensor thats why it needs to be expressed constitutively.

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