If a Drug Is Designed to Denature Enzymes Involved in Digesting

question 48

Multiple Choice

If a drug is designed to denature enzymes involved in digesting phenylalanine,why would patients treated with this drug develop 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:

Sclera

The protective and structural white exterior of the eyeball.

Optic Nerve

The nerve that transmits visual information from the retina to the brain, playing a critical role in vision.

Lens

A transparent, flexible structure in the eye that focuses light onto the retina, allowing for clear vision.

Pupil

the circular opening in the center of the eye’s iris that regulates the amount of light reaching the retina.