The lac repressor stops the expression of the genes in the lac operon.It does this by binding to a gene regulatory DNA sequence that controls the expression of the genes responsible for lactose uptake and degradation.This DNA sequence is called a(n)
A) operator.
B) operon.
C) repressicon.
D) inhibiron.

Question

Quizplus · Accepted Answer

The regulatory DNA sequence that controls the expression of the genes in the lac operon is called the operator. The lac repressor protein binds to the operator to prevent RNA polymerase from transcribing the genes responsible for lactose uptake and degradation. The other answer choices, operon, repressicon, and inhibiron, are not accurate terms for this regulatory sequence.

The Lac Repressor Stops the Expression of the Genes in the Lac