In phenylketonuria, an individual cannot break down the amino acid phenylalanine. Molecules that include phenylalanine build up in the blood, which causes intellectual disability and other symptoms. This inherited disease can be controlled by following a diet that is very low in
A)carbohydrates.
B)cholesterol.
C)protein.
D)nucleic acids.

Question

Quizplus · Accepted Answer

Phenylketonuria is caused by a deficiency in the enzyme phenylalanine hydroxylase, which is needed to convert phenylalanine to tyrosine. Therefore, individuals with phenylketonuria need to restrict their intake of protein, which is a source of phenylalanine. A diet that is very low in carbohydrates, cholesterol, or nucleic acids would not have a significant impact on phenylalanine levels in the blood.

In Phenylketonuria, an Individual Cannot Break Down the Amino Acid