試題詳解

33. Which of the following descriptions about phenylalanine hydroxylase deficiency is not true?
(A) The ability of cells to produce tyrosine is reduced.
(B) It may result in the accumulation of pyruvate in the body.
(C) The amount of phenylpyruvate excreted in the urine is greatly increased.
(D) The resulting disease is called phenylketonuria, which often affects intellectual development in untreated patients.
(E) Such patients can be treated with a diet low in phenylalanine.