2017 BiomoleculesEnzymes – cofactors and coenzymes Easy Question 55 of 107 in Biomolecules

Which one of the following statements is correct, with reference to enzymes?

A Apoenzyme = Holoenzyme + Coenzyme
B Holoenzyme = Apoenzyme + Coenzyme
C Coenzyme = Apoenzyme + Holoenzyme
D Holoenzyme = Coenzyme + Cofactor

The answer is B.

Solution

Holoenzyme = apoenzyme (protein) + cofactor/coenzyme.

A holoenzyme is a conjugated enzyme in which the protein part is the apoenzyme while the non-protein part is the cofactor. Coenzymes are organic compounds whose association with the apoenzyme is only transient; they serve as cofactors.

Concept holoenzyme-apoenzyme

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107 questions from this chapter have appeared across 26 exam years.