NEET Biology question
I. Inborn error of metabolism; II. Homozygous recessive autosomal alleles on chromosome 12 causes absence of the specific enzyme; III. A specific amino acid do not changes into tyrosine; IV. Accumulation of phenylpyruvic acid and other derivatives leading to mental retardation. The above facts refer to
Answer: (B)
Solution
All four facts precisely describe phenylketonuria: it is an inborn error of metabolism, caused by a homozygous recessive autosomal allele on chromosome 12 that results in the absence of the enzyme phenylalanine hydroxylase, so that
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