Question

Protein part of a holoenzyme is known as

• A. Coenzyme
• B. Apoenzyme
• C. Exoenzyme
• D. Endoenzyme

Answer 1

The correct option is A Coenzyme

Protein part of a holoenzyme is known as apoenzyme. Certain enzymes work in the presence of non-protein substances known as cofactors. An organic non-protein cofactor which is easily separable from its protein part is known as coenzyme and non-protein cofactor that is tightly bound to the enzyme is known as prosthetic group. A working combination of an apoenzyme and cofactor is known a s holoenzyme.

Exoenzymes are those enzymes which leave the cells and functio outside the cells such as salivary amylase and gastric pepsin.

Endoenzymes are those enzymes which remain and function inside cells such as mitochondrial and chloroplast enzymes.

This, the correct answer is option B.