JEE Main levelSingle correct optionDifficulty 2 of 3bm123
Which statement about cofactors is correct?
AA coenzyme is a non-protein organic cofactor, and many coenzymes are derived from vitamins.
BA coenzyme is always a metal ion bound to the protein part.
CA prosthetic group is a cofactor that binds only temporarily and is lost on dialysis in every case.
DCofactors are the protein part of an enzyme and are needed only for substrate binding.
Answer: A
Cofactors are non-protein components needed for activity. Organic cofactors are coenzymes, and many (such as the B vitamins) are derived from vitamins. Metal ions form a separate class and the protein part is the apoenzyme.