Which of the following statements about phenylketonuria (PKU)is false?
A)Buildup of phenylpyruvic acid affects the nervous system.
B)The amino acid tyrosine cannot be made.
C)Production of the hormone thyroxin s affected.
D)The skin color of those with phenylketonuria is light because of decreased levels of melanin.
E)Adrenalin levels increase in the blood stream.

Question

Quizplus · Accepted Answer

Phenylketonuria (PKU) is a metabolic disorder that results from a deficiency of the enzyme phenylalanine hydroxylase, leading to a buildup of phenylalanine and its metabolites, such as phenylpyruvic acid, which can affect the nervous system. This condition also impairs the body's ability to produce tyrosine from phenylalanine, which in turn affects the production of melanin (leading to lighter skin color) and the synthesis of the hormone thyroxin. However, there is no direct evidence that PKU causes an increase in adrenaline levels in the bloodstream, making option E the false statement.

Which of the Following Statements About Phenylketonuria (PKU)is False