What genetic disorder is associated with the lack of an enzyme necessary for the normal metabolism of the amino acid phenylalanine?
A) phenylketonuria (PKU)
B) Marfan syndrome
C) Huntington disease
D) sickle cell disease
E) cystic fibrosis (CF)

Question

Quizplus · Accepted Answer

Lack of the enzyme phenylalanine hydroxylase leads to the buildup of phenylalanine in the blood, causing phenylketonuria (PKU).

What Genetic Disorder Is Associated with the Lack of an Enzyme