An apoenzyme is defined as an enzyme that is

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Study with the DAT Bootcamp Molecules and Fundamentals of Biology test. Use flashcards and multiple choice questions with hints and explanations to prepare effectively.

Multiple Choice

An apoenzyme is defined as an enzyme that is

Explanation:
An apoenzyme is the protein part of an enzyme that cannot catalyze a reaction on its own because it lacks the necessary nonprotein cofactor. When the cofactor binds, the enzyme becomes active, forming the holoenzyme. So the apoenzyme is inactive without cofactors. The other descriptions describe the active enzyme or a permanently attached cofactor, not the protein alone, and thus don’t fit the definition.

An apoenzyme is the protein part of an enzyme that cannot catalyze a reaction on its own because it lacks the necessary nonprotein cofactor. When the cofactor binds, the enzyme becomes active, forming the holoenzyme. So the apoenzyme is inactive without cofactors. The other descriptions describe the active enzyme or a permanently attached cofactor, not the protein alone, and thus don’t fit the definition.

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