Question

PLEASE HELP 80 POINTS!! Which gene expression is blocked in the lac operon system? (If wrong, answer will be reported).

1. The repressor protein destroys the genes required to produce enzymes.
2. Lactose binds to the repressor and changes its shape.
3. The repressor protein blocks the genes from making mRNA
4. RNA polymerase begins transcribing the genes.

Answer 1

This is the correct answer; I took the test.

Answer 2

number 2. is the answer glad i could help Elena because When the lac operon detects lactose, it will bind to the lactose to stop gene expression.