In lac operon,the switching on or switching o | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In the $lac$ operon,the expression of structural genes is regulated by a repressor protein,which is the product of the regulator gene ($i$ gene).W

Vedclass · Accepted Answer

regulator protein

Vedclass · Answer

(B) In the $lac$ operon,the expression of structural genes is regulated by a repressor protein,which is the product of the regulator gene ($i$ gene).When the inducer (lactose) is absent,the repressor protein binds to the operator region,preventing $RNA$ polymerase from transcribing the structural genes (switching off).When the inducer (lactose/allolactose) is present,it binds to the repressor protein,causing a conformational change that prevents the repressor from binding to the operator,thereby allowing transcription to proceed (switching on).Thus,the regulator protein is responsible for switching the operator on or off.

In $lac$ operon,the switching on or switching off of the operator is achieved by . . . . . . .

Similar Questions

The activity of the structural gene is controlled by:

Transposons can be used during which one of the following?

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

Wild type $E. coli$ cells are growing in a normal medium with glucose. They are transferred to a medium containing only lactose as the sugar. Which one of the following changes takes place?

The regulation of the $lac$ operon by a repressor is known as:

Vedclass Test Series

Exam Paper Generator

Online Exam Module