Why Does Phenylalanine Accumulate in Patients with Phenylketonuria

question 17

Multiple Choice

Why does phenylalanine accumulate in patients with phenylketonuria?

• A)They lack an enzyme to break down phenylalanine.
• B)They lack an enzyme to produce phenylalanine.
• C)They produce too much phenylalanine.
• D)They lack an inhibitor of an enzyme to break down phenylalanine.
• E)They eat more phenylalanine than most peoplE.

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Definitions:

Dishabituate

The process of responding to an old stimulus as if it were new again, usually after a varying stimulus has interrupted a period of habituation.

Distressed

Experiencing anxiety, sorrow, or pain; being in a state of mental suffering.

Primary Sex Characteristic

The physical attributes directly involved in reproduction, such as the ovaries in females and testes in males.

Penis Growth

Refers to changes in penis size, often discussed in the context of puberty or medical treatments.