You are examining an enzyme associated with cysteine biosynthesis.You would expect expression of the enzyme to be
A)amplified when cysteine concentrations are high.
B)induced by cysteine.
C)repressed by cysteine.
D)high when ATP concentrations in the cell are low.
E)controlled by a riboswitch.

Question

Quizplus · Accepted Answer

Enzymes involved in the biosynthesis of amino acids, like cysteine, are typically subject to feedback inhibition, where the presence of the end product (in this case, cysteine) represses the expression of the enzyme to prevent overproduction of the amino acid.

You Are Examining an Enzyme Associated with Cysteine Biosynthesis