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How would lac operon operate in E.coli growing in a culture medium where lactose is present as source of sugar?

  1. How would lac operon operate in E.coli growing in a culture medium where lactose is present as
    source of sugar?

Grade:12

1 Answers

Gaurav
askIITians Faculty 164 Points
6 years ago
Hello Student

Lactose is the substrate for β- galactosidase and it regulates the switching on and off of the lac operon. Hence it is called inducer.
In the absence of glucose, if lactose is added in the growth medium of the bacteria, the lactose is transported into the cell bypermease.

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