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NEET2018ZoologyPrinciples of Inheritance and VariationActual

Assertion : Accumulation of phenyl pyruvic acid in brain results in mental retardation in case of phenylketonuria. Reason: The affected individual lacks enzyme for the conversion of phenylalanine into tyrosine.

Options

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

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

Phenylketonuria is an autosomal recessive disease, caused due to mutation in chromosome 7 . In this disease, phenyl pyruvic acid gets accumulated in brain. Affected individual lacks phenylalanine hydroxylase.

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