First slide

Regulation of Gene Expression

Question

Lac operon is

Easy

A

Inducible operon
B

Constitutive operon
C

House keeping operon
D

Positive repressible operon

Solution

Lac operon is inducible operon because its structural gene expression is promoted by the presence of the substrate Lactose. It shows negative regulation because the product of regulatory gene binds to operator to prevent the transcription of structural genes in the absence of a substrate.

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