Question

Which statement regarding coenzyme is incorrect?

• A. Every cofactor is a coenzyme and every coenzyme is a cofactor
• B. Every coenzyme is a cofactor but every cofactor is not a coenzyme
• C. Most of the coenzymes are nucleotides and are composed of vitamins
• D. Coenzymes are the active constituents of enzymes

Answer 1

Answer: (A)

Every coenzyme is a cofactor but every cofactor is not a coenzyme.
Cofactors can be classified depending on how tightly they bind to an enzyme, with loosely bound cofactors termed coenzymes and tightly bound cofactors termed prosthetic groups.