What Is the Genetic Defect Responsible for PKU

Multiple Choice

What is the genetic defect responsible for PKU?

A) A mutation in the PAH gene causes the body to break down phenylalanine more rapidly than normal.
B) A mutation in the PAH gene inactivates the phenylalanine hydroxylase enzyme.
C) A mutation in the PAH gene causes the body to break down the amino acid tyrosine more rapidly than normal.
D) A mutation in the PAH gene causes the body to break down the amino acid tyrosine more slowly than normal.
E) A mutated protein causes the body to convert tyrosine into phenylalanine.