Assertion : The protein part of the enzyme is called apoenzyme and non-protein part of the enzyme is called co-factor.
Reason : Zinc is a co-factor for the proteoilytic enzyme carboxypeptidase.

Answer

B

Explanation

Conjugate enzyme is an enzyme which is formed of two parts-a protein part called apoenzyme (e.g., flavoprotein) and a non-protein part named co-factor. The compete conjugate enzyme, consisting of an apoenzyme and a co-factor, called holoenzyme. Co-factor is small, heat stable and dialysable part of conjugate enzyme. It may be inorganic or organic in nature. Organic co-factors are of two types, coenymes and prosthetic groups. Inorganic co-factors include ions of a variety of minerals e.g., calcium, iron, copper, zinc, magnesium, manganese, potassium, nickel, molybdenum, selenium, cobalt. They usually function as activators. Zinc is required for carboxypeptidase `NAD^(+)` and `NADP^(+)` activity.