In which of the following conditions can the failure to follow a carefully prescribed diet result in mental retardation?
A) Williams' syndrome
B) Alzheimer's disease
C) fragile X syndrome
D) phenylketonuria (PKU)

Question

Quizplus · Accepted Answer

The condition in which the failure to follow a carefully prescribed diet can result in mental retardation is phenylketonuria (PKU). PKU is a genetic disorder in which the body is unable to break down the amino acid phenylalanine, which builds up in the bloodstream and can damage brain cells. Treatment involves avoiding phenylalanine in the diet, so failure to follow the prescribed diet can result in mental retardation. Williams' syndrome, fragile X syndrome, and Alzheimer's disease do not require a carefully prescribed diet to prevent mental retardation.

In Which of the Following Conditions Can the Failure to Follow