RE-NEET2026Zoology-Genetics
RE-NEET 2026 Zoology Gene Regulation MCQ Question
Type: MCQ-conceptual-Medium
Which of the following statements about lac-operon is correct?
A
Lactose activates repressor to bind to the operator
B
Genes i, z, y, and a share single common promoter
C
Galactose can act as an inducer of lac operon
D
Gene i is constitutively expressed
Correct Answer
Option D
Detailed Explanation
Gene i, which codes for the repressor protein, is constitutively expressed in the lac operon model.
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