Question

NAD and NADP are

• A. not a participant in any catalytic reaction
• B. participants as cofactors in non-catalytic reaction
• C. participants as cofactor in enzyme catalysed reaction
• D. participants as cofactor in both non-catalytic and enzyme catalysed reactions

Answer 1

The correct option is C participants as cofactor in enzyme catalysed reaction

An enzyme consists of a protein part (apoenzyme) and non-protein part (cofactor). The apoenzyme and cofactor together are called holoenzymes.

There are three kinds of cofactors - prosthetic groups, coenzymes and metal ions.
The organic cofactor includes the prosthetic groups and coenzymes while metal ions are the inorganic part.

NAD and NADP are types of coenzymes which contain the vitamin niacin. They participate as coenzymes in enzyme catalysed reactions.