First slide

Regulation of Gene Expression

Question

In lac operon, the product of 'i' gene binds to the operator

Easy

A

when bacterial cell has abundant amount of lactose
B

when bacterial cell has no lactose
C

RNA polymerase binds to the promoter
D

RNA polymerase synthesises β galactosidase continuously

Solution

Product of 'i' gene is repressor protein. It binds to operator when there is no lactose available in the medium.

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