Botany-Gene Regulation
NEET Botany Gene Regulation Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): Lactose acts as an inducer for the lac operon by binding to the repressor protein. | Reason (R): In the absence of lactose, the repressor protein binds to the operator region and prevents transcription by RNA polymerase.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
Lactose acts as an inducer by binding to the repressor protein and preventing it from binding to the operator, thereby allowing transcription. In the absence of lactose, the repressor binds to the operator, preventing transcription as per the NCERT context.
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