First slide

Regulation of Gene Expression

Question

Why glucose and galactose cannot act as an inducer for lac operon?

Easy

A

Because they cannot bind with the repressor
B

Because they can bind with the repressor
C

Because they can bind with the operator
D

Because they can bind with the regulator

Solution

An inducer binds with the repressor protein and prevents the repressor protein from binding to the operator. Glucose and galactose cannot act as an inducer because these do not have the binding sites for attaching the repressor protein.

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