MHT CET 202623 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Principles of Inheritance and Variation
MHT CET 2026 · 23 April · Evening Shift · Biology · Principles of Inheritance and Variation
Read the following statement with respect to Phenylketonuria (PKU)...
Read the following statement with respect to Phenylketonuria (PKU) and select the correct option.
(A). It is an inborn disorder caused due to dominant gene.
(B). When recessive genes are present in homozygous condition, Phenylalanine hydroxylase enzyme is not produced.
(C). This enzyme is essential for conversion of amino acid tyrosine into phenylanine
(A). It is an inborn disorder caused due to dominant gene.
(B). When recessive genes are present in homozygous condition, Phenylalanine hydroxylase enzyme is not produced.
(C). This enzyme is essential for conversion of amino acid tyrosine into phenylanine
Options
- AStatement A, B are correct and C is incorrect
- BStatement B is correct and A and C are incorrect
- CStatement A, B and C are incorrect
- DStatement A, B and C are correct
Correct answer
B. Statement B is correct and A and C are incorrect
Step-by-step solution
Phenylketonuria (PKU) is an inborn error of metabolism that is inherited as an autosomal recessive trait. Thus, statement A is incorrect.
The affected individual lacks the enzyme phenylalanine hydroxylase, which is not produced when the recessive genes are present in a homozygous condition. Thus, statement B is correct.
The enzyme phenylalanine hydroxylase is essential for the conversion of the amino acid phenylalanine into tyrosine, not the other way around. Thus, statement C is incorrect.
Therefore, statement B is correct and A and C are incorrect.
Answer: Statement B is correct and A and C are incorrect
The affected individual lacks the enzyme phenylalanine hydroxylase, which is not produced when the recessive genes are present in a homozygous condition. Thus, statement B is correct.
The enzyme phenylalanine hydroxylase is essential for the conversion of the amino acid phenylalanine into tyrosine, not the other way around. Thus, statement C is incorrect.
Therefore, statement B is correct and A and C are incorrect.
Answer: Statement B is correct and A and C are incorrect