Ques. Gene regulation governing lactose operon of E.coli that involves the lac I gene product is
A. negative and repressible because repressor protein prevents transcription
B. feedback inhibition because excess of β-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.
Answer:D
Ques. Gene regulation governing lactose operon of E.coli that involves the lac I gene product is
A. negative and repressible because repressor protein prevents transcription B. feedback inhibition because excess of β-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.