What Does the Presence of Lactose Allow in the E

Question

What does the presence of lactose allow in the E. coli lac operon?
A) dissociation of the Lac repressor from the promoter
B) dissociation of the Lac repressor from the operator
C) binding of the Lac repressor to the operator
D) binding of the Lac repressor to glucose

Accepted Answer

Lactose presence in the E. coli lac operon allows for the dissociation of the Lac repressor from the operator region. This removal of the repressor enables RNA polymerase to bind to the promoter and transcribe the genes necessary for lactose metabolism.