The metal ion which is required for the normal functioning of enzyme is called a. Apoenzyme b. Coenzyme c. Holoenzyme d. Cofactor
option d. The holoenzyme is defined as apoenzyme in combination with the cofactor. A cofactor is a non-protein part of the enzyme. It can be metal ions or the organic chemical. The cofactors which are organic chemicals are known as the coenzyme. These are loosely attached to the apoenzyme. The tightly bound coenzymes are the prosthetic group.
