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Phenylketonuria is best described as
Aa chromosomal aneuploidy
Ban acquired infection
Ca nutritional deficiency
Dan inborn error of metabolism
Answer & Solution
Correct answer: D. an inborn error of metabolism
1. Some Mendelian disorders act by disabling a single enzyme.
2. Phenylketonuria is an inborn error of metabolism.
3. It is inherited as an autosomal recessive trait.
4. Being inborn and inherited, it is neither acquired nor nutritional in origin.
_Source: NCERT Class 12 Biology Ch4 'Principles of Inheritance and Variation'_
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