Nicotinamide adenine dinucleotide is an example of:
Correct answer: A. Coenzymes
- A. Coenzymes
- B. Holoenzymes
- C. None of these
- D. Both of these
Explanation
A coenzyme is defined as an organic molecule that binds to the active sites of certain enzymes to assist in the catalysis of a reaction. NAD is the most important coenzyme as well as cofactor in a eukaryotic cell. Not surprisingly, NAD and the closely related NADP are the two most abundant cofactors in eukaryotic cell.
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About Enzymes as Biocatalysts
Enzymes are protein or RNA biocatalysts that lower activation energy without being consumed, and their active sites bind specific substrates. The topic covers the lock and key and induced fit models, effects of temperature, pH and substrate concentration, cofactors, enzyme specificity, and competitive versus non-competitive inhibition.
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