Coenzyme for phenylalanine hydroxylase is -
Tetrahydrofolate
Pyridoxal phosphate
S-adenosyl methionine
Tetrahydrobiopterin
Ans. is 'd' i.e., Tetrahydrobiopterino Phenylalanine metabolism is initiated by its oxidation to tyrosine which then undergoes oxidative degradation.
Amino Acid Metabolism