Which of the following characteristics is NOT | vedclass

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(D) Phenylketonuria $(PKU)$ is an inborn error of metabolism inherited as an autosomal recessive trait.In this disorder,the affected individual lacks

Vedclass · Accepted Answer

Increase in the level of Tyrosine

Vedclass · Answer

(D) Phenylketonuria $(PKU)$ is an inborn error of metabolism inherited as an autosomal recessive trait.In this disorder,the affected individual lacks the enzyme Phenylalanine hydroxylase,which is required to convert the amino acid Phenylalanine into Tyrosine.Due to this deficiency,Phenylalanine accumulates and is converted into Phenylpyruvic acid and other derivatives,leading to mental retardation.Accumulation of these derivatives in the brain results in mental retardation,and they are also excreted through urine because of poor absorption by the kidney.Since the conversion of Phenylalanine to Tyrosine is blocked,the level of Tyrosine decreases,not increases.Therefore,the statement 'Increase in the level of Tyrosine' is incorrect and not associated with $PKU$.

Which of the following characteristics is $NOT$ associated with Phenylketonuria $(PKU)$?

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