Question

The biochemical defect in phenylketonuria (PKU) is a functional deficiency of the liver enzyme phenylalanine hydroxylase, which catalyzes the para-hydroxylation of phenylalanine to yield what amino acid?

1: Threonine
2: Alanine
3: Methionine
4: Tyrosine

Answer 1

The biochemical defect in phenylketonuria (PKU) is a functional deficiency of the liver enzyme phenylalanine hydroxylase, which catalyzes the para-hydroxylation of phenylalanine to yield tyrosine.

Step-by-step explanation:

The biochemical defect in phenylketonuria (PKU) is a functional deficiency of the liver enzyme phenylalanine hydroxylase, which catalyzes the para-hydroxylation of phenylalanine to yield the amino acid tyrosine.