Homework Answers
Answer - Cofactor
Cofactor is the compund i.e organic compounds or the metal ions that are tightly bound to the active site.The act as the catalyst in the chemical reaction.
Metal ions like ferric ion is the metallic Cofactor that is bound to the active site.
The option subtrate is wrong because ferric ions doesn't come under substrate. Ferric ion is neither a enzyme. There is no evidence of side chain binding to activate site. Hence cofactor is correct answer
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