An inactive protein part of an enzyme combines with a non-protein cofactor to give the active enzyme. What are these called?
Correct answer B. Apoenzyme + cofactor = holoenzyme
Explanation
The protein part alone is the apoenzyme and is inactive. When it combines with its cofactor, such as a metal ion or an organic coenzyme like NAD⁺, the complete active enzyme is called the holoenzyme.
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