Tyra has phenylketonuria (PKU). Which statement is accurate?

A. Tyra must be on a specialized diet high in phenylalanine for her entire life.
B. Phenylalanine in Tyra's diet helps to myelinate axons.
C. Tyra can introduce phenylalanine into her diet as a child.
D. Phenylketonuria results from a missing enzyme.


Answer: D

Psychology

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