Women with PKU must avoid the essential amino acid phenylalanine and consume a diet low in protein because _____.
A) they lack enough stomach acid (HCl) to break down dietary proteins, including phenylalanine
B) they are allergic to phenylalanine and other protein-rich foods
C) they lack the enzyme necessary to convert phenylalanine to tyrosine
D) phenylalanine and protein-rich foods cause acid to build up in blood
E) they are unable to incorporate phenylalanine into proteins, so it builds up in blood, potentially blocking blood vessels

Question

Quizplus · Accepted Answer

Individuals with PKU lack the enzyme necessary to convert phenylalanine to tyrosine, leading to an accumulation of phenylalanine in the blood, which can be toxic to the brain. Therefore, they must avoid phenylalanine and consume a low-protein diet to manage their condition.

Women with PKU Must Avoid the Essential Amino Acid Phenylalanine