Essential Biochemistry - Protein Metabolism (Section 7 - No. 36)
Which enzyme is deficient in phenylketonuria?
Phenylalanine hydroxylase
Tyrosine aminotransferase
Tryptophan dioxygenase
Histidine decarboxylase
Explanation
Phenylketonuria is caused by a deficiency in phenylalanine hydroxylase.
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