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(C) In $E. coli$,the $lac$ operon is responsible for the metabolism of lactose. When glucose is present,the $lac$ operon is repressed because glucose

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The $lac$ operon is induced.

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(C) In $E. coli$,the $lac$ operon is responsible for the metabolism of lactose. When glucose is present,the $lac$ operon is repressed because glucose is the preferred energy source. When glucose is removed and only lactose is provided,lactose acts as an inducer. It binds to the repressor protein,preventing it from binding to the operator region. This allows $RNA$ polymerase to transcribe the structural genes,thereby inducing the $lac$ operon.

Wild-type $E. coli$ cells are grown in a normal medium containing glucose. They are then transferred to a medium containing only lactose as the sugar source. Which of the following changes will occur?

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