Home Biology Molecular Basis of Inheritance Previous Year Questions Gene regulation governing lactose operon of …
Biology Molecular Basis of Inheritance Previous Year Questions Single Correct MCQ
Published on: August 13, 2026

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

A
Negative and inducible because repressor protein prevents transcription
B
Negative and repressible because repressor protein prevents transcription
C
Feedback inhibition because excess of β -galactosidase can switch off trascription
D
Positive and inducible because it can be induced by lactose

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