Multiple choice

Which of the following is not protein?

  1. Enzyme

  2. Apoenzyme

  3. Coenzyme

  4. Isoenzyme
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Coenzymes are small organic non-protein molecules that assist enzymes in catalyzing reactions. Enzymes, apoenzymes (protein part of enzyme), and isoenzymes (different forms of the same enzyme) are all proteins. Only coenzymes are not proteins.

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