Which of the following best explains how the prokaryotic expression of a metabolic protein can be regulated when the protein is already present at a high concentration?

A. Repressor proteins can be activated and bind to regulatory sequences to block transcription.

Explanation:

its A

A

Explanation:

the person above me is correct

i am going to guess that it is co2.

it's     c       this is a cell (b) with a nucleus (c) containing dna (a). the dna is organized into chromosomes (d). a section of the chromosome that codes for a trait is called a gene (e).