Question

The biosynthetic pathway for the two amino acids E and H is shown schematically in Figure Q4-60. You are able to show that E inhibits enzyme V, and H inhibits enzyme X. Enzyme T is most likely to be subject to feedback inhibition by __________________ alone.

(a) H
(b) B
(c) C
(d) E

Answer 1

The enzyme T in the biosynthetic pathway for amino acids E and H is likely subject to feedback inhibition by the amino acid E, since E inhibits an enzyme V in the same pathway, demonstrating a common regulatory mechanism known as feedback inhibition.

Step-by-step explanation:

It provides a scenario where amino acid E inhibits enzyme V, and amino acid H inhibits enzyme X in a biochemical pathway. Feedback inhibition often targets the first committed step in a pathway. Therefore, enzyme T, which is not specified in the details but is inferred to be an early enzyme in the pathway, is most likely to be subject to feedback inhibition by the end product that accumulates when no further production is needed.