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NEETZoologyMolecular Basis of Inheritance

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

Options

  1. Alactose is present and it binds to the repressor
  2. Brepressor binds to operator
  3. CRNA polymerase binds to the operator
  4. Dlactose is present and it binds to RNA polymerase

Correct answer

A. lactose is present and it binds to the repressor

Step-by-step solution

Presence of lactose switches on lac operon as allolactose removes the repressor for RNA polymerase to bind.

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