The switching on and off of the lac operon is | vedclass

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(D) The $lac$ operon is an inducible operon system. In the absence of an inducer (lactose),the repressor protein binds to the operator region,preventi

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Inducer

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(D) The $lac$ operon is an inducible operon system. In the absence of an inducer (lactose),the repressor protein binds to the operator region,preventing $RNA$ polymerase from transcribing the structural genes,thus keeping the operon 'switched off'. In the presence of an inducer (lactose or allolactose),the inducer binds to the repressor protein,causing a conformational change that prevents the repressor from binding to the operator. This allows $RNA$ polymerase to transcribe the structural genes,effectively 'switching on' the operon. Therefore,the presence or absence of the inducer is the primary factor regulating the switching on and off of the $lac$ operon.

The switching on and off of the $lac$ operon is regulated by which of the following?

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