Describe how the lac operon operates, both in the presence and absence of an inducer in E. coli.

In E. coli, the lac operon gets switched on when

In E. coli, the lac operon gets switched on when

Explain the role of lactose as an inducer in a lac operon

In a bacterial culture, some of the colonies produced blue colour in the presence of a chromogenic substrate and some did not due to the presence or absence of an insert (rDNA) in the coding sequence of beta - galactosidase. (a) Mention the mechanism and the steps involved in this experiment. (b) How is it advantageous over simultaneous plating on two plates having different antibiotics?

Which of the following cellular metabolic processes can occur both in the presence or absence of O_(2) ?

The presence of E. coli in water indicates