Question

In lac operon i gene codes for

• A. Inducer of lac operon
• B. Repressor of lac operon
• C. Hydrolysis of disaccharide
• D. Permease

Answer 1

Answer: (B)

Repressor of lac operon

• Lac operon is a operon that is required for the transport and metabolism of lactose in E.coli.
• It consists of a promoter, gene $i$ (regulatory gene) that represses the lac operon by producing a repressor molecule and an operator.
• It also consists of coding regions the lac Z, lac Y, and lac A.

So, the correct answer is option B.