Which of the following statements about lac-operon is correct?

A Gene i is constitutively expressed

B Lactose activates repressor to bind to the operator

C Genes i, z, y and a share single common promoter

D Galactose can act as an inducer of lac operon

The answer is A.

Solution

Reference: NCERT Class XII, page 100.

Concept Lac operon

4 questions from this chapter have appeared across 4 exam years.