A disorder in which the liver fails to produce a certain enzyme necessary for early brain development is ________.
A) Down syndrome
B) PKU
C) fragile-X syndrome
D) Tay-Sach's disease

Question

Quizplus · Accepted Answer

PKU (phenylketonuria) is a genetic disorder in which the liver fails to produce the enzyme phenylalanine hydroxylase, which is necessary for the breakdown of the amino acid phenylalanine. Without this enzyme, phenylalanine builds up in the blood and can cause brain damage. It is important for individuals with PKU to adhere to a special low-phenylalanine diet to prevent cognitive impairment.

A Disorder in Which the Liver Fails to Produce a Certain