The product of the lacI gene is most like a car's
A)parking brake.
B)accelerator pedal.
C)steering wheel.
D)engine.
E)wheels.

Question

Quizplus · Accepted Answer

The lacI gene encodes for a protein called Lac repressor, which binds to the operator region of the lac operon and inhibits the transcription of genes involved in lactose metabolism. This is similar to how a parking brake prevents the car from moving by inhibiting the action of the accelerator pedal. Therefore, the lacI gene product is most like a car's parking brake.

The Product of the LacI Gene Is Most Like a Car's