Question

Operons involved with the biosynthesis of molecules such as amino acids, are most likely to be regulated in the following manner :

A) The product of bio synthetic pathway represses transcription
B) The product of the bio synthetic pathway activates transcription
C) The precursor of the bio synthetic pathway represses transcription
D) The precursor of the bio synthetic pathway activates transcription

Answer 1

Operons involved in the biosynthesis of molecules such as amino acids are most likely regulated by repression, where the product of the biosynthetic pathway represses transcription of the operon.

Step-by-step explanation:

In prokaryotic cells, operons involved in the biosynthesis of molecules such as amino acids are most likely to be regulated by repression. This means that the product of the biosynthetic pathway represses transcription of the operon. When the product of the pathway, like an amino acid, accumulates in the cell, it binds to a repressor molecule which then binds to the operator region of the operon, preventing RNA polymerase from transcribing the structural genes.