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  • The wild-type E. coli cells are growing in a normal medium with glucose. They are transferred to a medium containing only lactose as sugar. Which of the followin

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

Option: 1

The Lac operon is repressed

 


Option: 2

All operons are induced


Option: 3

The Lac operon is induced


Option: 4

E. coli cells stop dividing


Answers (1)

best_answer

Inducible genes are the genes which remain inactive or repressed in a cell and can be activated when a certain substrate is to be metabolised. It has been seen when lactose is added to the medium of E.coli the operon is induced and synthesis of enzymes required for degradation of lactose to glucose and galactose starts.Hence, the correct answer is option 3.

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