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 in E. coli. | Reason (R): Presence of lactose prevents the repressor protein from binding to the operator region.
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 preventing the repressor from binding to the operator, thus allowing RNA polymerase to transcribe the operon. This is explained in the NCERT context about gene regulation.
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