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NEET2001ZoologyPrinciples of Inheritance and VariationActual

Assertion : Phenylketonuria is a disease in which excretion of phenylalanine occurs in urine. Reason : It is due to dietary imbalance.

Options

  1. AIf both Assertion and Reason are true and Reason is the correct explantion of Assertion
  2. BIf both Assertion and Reason are true and Reason is not the correct explanation of Assertion
  3. CIf Assertion is true but Reason is false
  4. DIf Assertion is false but Reason is true.

Correct answer

C. If Assertion is true but Reason is false

Step-by-step solution

Phenlyketonuria is a genetic disorder in which there is disordered metabolism of the amino acid phenylalanine, leading to severe mental retardation of affected children. The disease is caused by the absence or deficiency of the enzyme phenylalanine hydroxylase, which results in the accumulation of phenylalanine in all body fluids. There are also high levels of the ketone phenylpyruvate in the urine, hence the name of the disease.

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