Select the molecule/s which cannot act as inducer in Lac operon.

Question

Select the molecule/s which cannot act as inducer in Lac operon. (A) Glucose (B) Lactose (C) Galactose (D) Both (1) and (3)

Tardigrade Admin · Accepted Answer

Lactose is the substrate for the enzyme β -galactosidase (one of the key enzymes in Lac operon) and also regulates the switching on and off of the operon and therefore, act as the inducer.

Q. Select the molecule/s which cannot act as inducer in Lac operon.

Glucose

Lactose

Galactose

Both (1) and (3)

Lactose is the substrate for the enzyme $β$ -galactosidase (one of the key enzymes in Lac operon) and also regulates the switching on and off of the operon and therefore, act as the inducer.