Question

Assertion (A): A coenzyme or metal ion that is very tightly bound to enzyme protein is called prosthetic group.
Reason (R): A complete catalytically active enzyme together with its bound prosthetic group is called apoenzyme.

• A. Both A and R are correct and R is the correct explanation of A
• B. Both A and R are correct, but R is the correct explanation of A
• C. A is correct but R is incorrect
• D. Both A and R are incorrect

Answer 1

The correct option is C A is correct but R is incorrect

The term 'enzyme' was the coined by Kuhne in 1878. Enzymes may be simple or conjugated enzymes are made up of two parts, i.e. apoenzymes (protein part of an enzyme) and cofactor (non-protein part of an enzyme) together they form a holoenzyme. When cofactor is an organic molecule and loosely attached with protein part, it is called coenzyme. If the cofactor is firmly bound, it is called prosthetic group.