What effect would you expect if gene expression of the $lac$ operon were completely repressed?

  • A
    The cell would be more efficient without 'wasting' the energy required for the low level of $Lac Z$,$Lac Y$,and $Lac A$ gene expression.
  • B
    Allolactose would accumulate within the cell and become toxic.
  • C
    Lactose would not be converted into the inducer and the operon could not be induced.
  • D
    All of the above

Explore More

Similar Questions

How is the $lac$ operon regulated by the repressor?

What does the given figure represent?

In the $lac$ operon,which of the following acts as an inducer?

What does the $i$ gene encode in the $lac$ operon?

Assertion $(A):$ Regulation of $lac$ operon by repressor is referred to as negative regulation.
Reason $(R):$ Repressor protein binds to the operator region and prevents $\text{RNA}$ polymerase from transcribing the operon.

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo