Q .     Gene regulation governing lactose operon of E.coli that involves the lac I gene product is

AIPMT 2015
A

Negative and repressible because repressor protein prevents transcription

B

Feedback inhibition because excess of `\beta`-galactosidase can switch off transcription

C

Positive and inducible because it can be induced by lactose

D

Negative and inducible because repressor protein prevents transcription

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