Small molecules compared to the protein part | vedclass

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(D) Enzymes are composed of one or several polypeptide chains. However,there are a number of cases in which non-protein constituents called cofactors

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Both $(A)$ and $(B)$

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(D) Enzymes are composed of one or several polypeptide chains. However,there are a number of cases in which non-protein constituents called cofactors are bound to the apoenzyme to make the enzyme catalytically active.Cofactors are non-protein parts that are smaller in size compared to the protein part (apoenzyme).Cofactors are of three kinds: prosthetic groups,coenzymes,and metal ions.Coenzymes are also organic compounds but their association with the apoenzyme is only transient,usually occurring during the course of catalysis.Since both cofactors (as a general term) and coenzymes (as a specific type of cofactor) are non-proteinaceous and smaller than the apoenzyme,both are correct in this context.

Small molecules compared to the protein part of enzymes are known as:

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