Which of the following enzymes is not present in the patients of Phenylketonuria?(a) Somatostatin(b) Testosterone(c) Phenylalanine hydroxylase(d) PhenylalanineI got this question in a national level competition.This is a very interesting question from Inheritance Principles topic in portion Principles of Inheritance and Variation of Biology – Class 12

Which of the following enzymes is not present in the patients of Pheny

1.	Which of the following enzymes is not present in the patients of Phenylketonuria?(a) Somatostatin(b) Testosterone(c) Phenylalanine hydroxylase(d) PhenylalanineI got this question in a national level competition.This is a very interesting question from Inheritance Principles topic in portion Principles of Inheritance and Variation of Biology – Class 12
Answer» Correct answer is (C) Phenylalanine hydroxylase For explanation: The individual which is affected by phenylketonuria lacks a liver enzyme CALLED phenylalanine hydroxylase which is responsible for converting phenylalanine, an AMINO ACID into tyrosine, another amino acid.

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