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NEETZoologyPrinciples of Inheritance and Variation

How is phenylpyruvic acid eliminated from the body in this disorder?

Options

  1. AIt is absorbed by the liver
  2. BIt is excreted through urine
  3. CIt is stored in the liver
  4. DIt is metabolized in the kidneys

Correct answer

B. It is excreted through urine

Step-by-step solution

This inborn error of metabolism is also inherited as the autosomal recessive trait. The affected individual lacks an enzyme that converts the amino acid phenylalanine into tyrosine. As a result of this phenylalanine is accumulated and converted into phenylpyruvic acid and other derivatives. Accumulation of these in brain results in mental retardation. These are also excreted through urine because of its poor absorption by kidney

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