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

  1. A
    Galactose
  2. B
    Lactose
  3. C
    Lactose and galactose
  4. D
    Glucose

Solution & Step-by-step Explanation

Lactose (or its isomer allolactose) acts as an inducer for the lac operon. It binds to the repressor protein, preventing it from binding to the operator, thereby allowing transcription of the structural genes.

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Which of the following is required as inducer(s) for the expression of Lac operon?
A
Galactose
B
Lactose
C
Lactose and galactose
D
Glucose

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