Question

In bacteria, the structural genes can be turned off when -

• A. the end product of a reaction combines with the repressor protein and activates it
• B. the substrate combines with a repressor protein and inactivates it
• C. the substrate combines with the promoter
• D. the substrate combines with its enzyme and produces a repressor molecule

Answer 1

Answer: (B)

Correct answer is (b) the substrate combines with a repressor protein and inactivates it