NEET 2016 Biology question

Which of the following is required as inducer(s) for the expression of Lac operon?

(1)Glucose
(2)Galactose
(3)LactoseCorrect
(4)Lactose and galactose

Answer: (3)

Solution

In the lac operon of E. coli, the repressor protein (product of the i gene) normally binds the operator and blocks transcription. Lactose (allolactose, its isomer) acts as the inducer: it binds the repressor, inactivates it, and so allows RNA polymerase to

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-091941