The proteins necessary for the use of lactose in E.coli are collectively called the
A)lac regulator.
B)lac suppressor.
C)lac operon.
D)lac promoter.
E)lac transcriptional operator.

Question

Quizplus · Accepted Answer

The lac operon is a group of genes in E.coli that encode the proteins necessary for the utilization of lactose. These genes are regulated by a promoter, operator, and regulatory genes, collectively known as the lac operon. The lac regulator and lac suppressor are both regulatory genes that control the expression of the lac operon. The lac transcriptional operator is a region of DNA that controls the binding of RNA polymerase to the promoter region of the lac operon. Therefore, the best choice is C, the lac operon.

The Proteins Necessary for the Use of Lactose in E