Question

Which one of the following enzyme does NOT operate in Lac Operon?

• A. DNAase
• B. permease
• C. $\beta$-galactosidase
• D. transacetylase

Hint:

LacZ, LacY, and LacA are the three structural genes of Lac operon.

Answer 1

The Correct Option is A

Step 1: Understanding Lac operon.
The Lac operon in {E. coli} controls lactose metabolism and includes genes lacZ, lacY, and lacA.
Step 2: Enzymes involved.
$\beta$-galactosidase, permease, and transacetylase are products of Lac operon genes, while DNAase is unrelated to lactose metabolism.
Step 3: Conclusion.
Therefore, DNAase does not operate in the Lac operon.