Question

Which of the following feature is common for NAD, NAD${}^{+}$,NADP?

• A. They undergo oxidation reactions
• B. They undergo enzyme catalysis
• C. They undergo hydrolysis
• D. None of the above

Answer 1

The correct option is D None of the above

Enzymes are simple if they are made up of the only protein chain, e.g., pepsin, amylase etc., while conjugate enzymes have an additional non-protein cofactor. The latter may be organic or inorganic. Loosely attached organic cofactor is coenzyme, example NAD, NAD+, NADP, while firmly attached one is called as a prosthetic group, e.g., haeme, biotin etc. The coenzymes like NAD, NADP take part in oxidation-reduction reactions and get reduced or oxidised by hydrogenation or dehydrogenation during metabolic reactions.

So, the correct answer is option D.