What Term Best Describes the Role of Certain Metal Ions

Question

What term best describes the role of certain metal ions and coenzymes in metabolic processes?  
A) Reactants
B) Intermediates
C) Cofactors
D) Products
E) Catalysts

Accepted Answer

Metal ions and coenzymes are considered cofactors, which are non-protein molecules that assist enzymes in catalyzing reactions. Cofactors can be metal ions, such as iron, magnesium, or zinc, or organic molecules, such as coenzymes like NAD+ or flavin adenine dinucleotide (FAD).