A complete enzyme that consists of a protein component and a nonprotein component is called a(n)

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A holoenzyme is a complete enzyme that consists of both a protein component (the apoenzyme) and a nonprotein component (the cofactor or coenzyme). Option A, apoenzyme, refers only to the protein component without the cofactor or coenzyme. Option B, heteroenzyme, refers to an enzyme that is composed of different subunits or different protein molecules. Option D, multienzyme, refers to a complex of two or more enzymes that work together as a unit.

A Complete Enzyme That Consists of a Protein Component and a Nonprotein