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[A]: PKU is a autosomal recessive heredi...

[A]: PKU is a autosomal recessive hereditary metabolic disease caused by the body's fail- ure to oxidise an amino acid (Phenylalanine) to tyrosine because of a defecitve enzyme.
[R]: It resulted the presence of phenylpyruvic acid in the urine.

A

If both A and R are true and R is the correct explanation of A

B

If both A and R are true but R is not the correct explanation of A

C

If A is true and R is false

D

If both A and R are false

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The correct Answer is:
A
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Assertion : Phenylketonuria is a recessive hereditary disease caused by the body 's failure to oxidize an amino acid phenylalanine to tyrosine , because of a defective enzyme. Reason : It results in the presence of phenylalanine acid in the urine .

State True of False (i) Hetrozygous female for baemophilia may transmit the disease to sons (ii) Affected individuals with phenylketonuna lack an enzyme that converts the amino acid phenylalanine into phenylpyruvic acid (iii) Klinefelter's syndrome is caused due to the presence of an additional copy of X-chromosome resulting into a karyotype of 47//XXX (iv) Failure of segregation of homologous pair of chromosomes during cell division cyclic results in Turner's syndrome.

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