The product of the lacI gene is
A) fi- galactosidase.
B) an enzyme.
C) a transport protein embedded within the membrane.
D) the repressor.

Question

Quizplus · Accepted Answer

The lacI gene codes for the lac repressor protein, which binds to the operator region of the lactose operon and prevents transcription of the lacZ, lacY, and lacA genes. Therefore, the product of the lacI gene is the repressor protein, not fi-galactosidase, an enzyme, or a transport protein.

The Product of the LacI Gene Is