Question

When does the lac repressor protein bind to the operator?

Answer 1

The Lac Repressor Protein. In the absence of lactose, the Lac repressor binds to the operator and keeps RNA polymerase from transcribing the lac genes. It would be energetically wasteful for E. coli if thelac genes were expressed when lactose was not present.

Answer 2

Hey mate ^_^

=======
Answer:
=======

In the absence of lactose, the Lac repressor binds to the operator and keeps RNA polymerase from transcribing the lac genes. 

#Be Brainly❤️