Haem group of the enzyme peroxidase is (A) Organic cofactor loosely associated with apoenzyme (B) Organic cofactor tightly bound to co-enzyme (C) Metal ion cofactor tightly bound to co-enzyme (D) Organic cofactor tightly bound to apoenzyme A o o 0 ) С C D

Organic compounds that are tightly bound to apoenzyme is

Co-enzymes are organic compounds but their association with the apoenzyme is only transient.

The tightly bound non-proteinaceous organic compound in enzyme, is

Assertion : Coenzymes serve as co-factors in a number of different enzyme catalyzed reactions. Reason : Coenzymes and prosthetic groups are cofactors.

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

Study the following statements : (a) The substrate binds to the active site of the enzyme (b) Enzyme isolated from thermophilic orgabisms get denatured at 50^(@)C (c ) The active site of enzyme breaks the chemical bonds of the product (d) Prosthetic groups are tightly bound to the apoenzyme Select the option which includes all correct statements

(a) What are cofactors ? Give one example. (b) Differentiate between apoenzyme, coenzyme and prosthetic group.