📝 Multiple Choice Question
General-science
Which non-essential amino acid is synthesised by the hydroxylation of phenylalanine in a reaction catalysed by phenylalanine hydroxylase?
A
Glutamine
B
Tyrosine
C
Cysteine
D
Glycine
Explanation
Tyrosine is synthesized in the body from phenylalanine; a deficiency in the enzyme responsible for this conversion causes phenylketonuria (PKU).
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