Question

In the medium where E. coli was growing, lactose was added, which induced the lac operon. Then, why does lac operon shut down some time after addition of lactose in the medium?

Explain in detail !!​

Answer 1

A N S W E R :

Lac-operon is switched on after the addition of lactose into the medium because lactose act as Inducer and makes the repressor inactive. Due to this switching on of the lac-operon system, beta-galactosidase is formed which converts lactose into glucose and galactose. As soon as the lactose in the medium get consumed, the repressor which was initially inactive, becomes active again and cause the shut down of the lac-operon system.

This is the reason why the lac-operon shuts down after some time after addition of lactose into the medium.

Answer 2

Answer:

riya di kha gyi

Explanation:

Golgi body, also known as a Golgi apparatus, is a cell organelle that helps process and package proteins and lipid molecules, especially proteins destined to be exported from the cell. Named after its discoverer, Camillo Golgi, the Golgi body appears as a series of stacked membranes.