Q28. Identify the statements which hold true for Phenylketonuria.
(A) Phenylketonuria is a sex-linke

Q: What is the correct answer for CUET UG Biology Q28?

The correct answer is C. Phenylketonuria is an autosomal recessive metabolic disorder, so (A) is false. The homozygous recessive individuals lack an enzyme called phenylalanine hydroxylase (D) which converts phenylalanine to tyrosine in the liver. The absence of this enzyme leads to the accumulation of phenylalanine, which causes skin pigmentation, mental retardation, and loss of hair (so B is a consequence, not a primary

Q: Q28. Identify the statements which hold true for Phenylketonuria. (A) Phenylketonuria is a sex-linked disorder (B) Phenylpyruvic acid is accumulated and converted to phenylalanine (C) It is caused by…

The correct answer is C. Phenylketonuria is an autosomal recessive metabolic disorder, so (A) is false. The homozygous recessive individuals lack an enzyme called phenylalanine hydroxylase (D) which converts phenylalanine to tyrosine in the liver. The absence of this enzyme leads to the accumulation of phenylalanine, which causes skin pigmentation, mental retardation, and loss of hair (so B is a consequence, not a primary

Q: What are the options for this CUET UG Biology question?

A. (A) and (B) only · B. (A) and (D) only · C. (C) and (D) only · D. (B) and (C) only

Question

Q28. Identify the statements which hold true for Phenylketonuria.
(A) Phenylketonuria is a sex-linked disorder
(B) Phenylpyruvic acid is accumulated and converted to phenylalanine
(C) It is caused by mutation in a pleiotropic gene
(D) The affected individual lacks enzyme phenylalanine hydroxylase
Choose the correct answer from the options given below:

FirstInTest · Accepted Answer

Phenylketonuria is an autosomal recessive metabolic disorder, so (A) is false. The homozygous recessive individuals lack an enzyme called phenylalanine hydroxylase (D) which converts phenylalanine to tyrosine in the liver. The absence of this enzyme leads to the accumulation of phenylalanine, which causes skin pigmentation, mental retardation, and loss of hair (so B is a consequence, not a primary cause). It is caused by mutation in a pleiotropic gene (C). Therefore, (C) and (D) are the most accurate statements.

Answer

(A) and (B) only

Answer

(A) and (D) only

Answer

(C) and (D) only

Answer

(B) and (C) only

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