What Is the Genetic Defect Responsible for PKU

question 18

Multiple Choice

What is the genetic defect responsible for PKU?

• A) A mutation in the PAH gene causes the body to break down phenylalanine more rapidly than normal.
• B) A mutation in the PAH gene inactivates the phenylalanine hydroxylase enzyme.
• C) A mutation in the PAH gene causes the body to break down the amino acid tyrosine more rapidly than normal.
• D) A mutation in the PAH gene causes the body to break down the amino acid tyrosine more slowly than normal.
• E) A mutated protein causes the body to convert tyrosine into phenylalanine.

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