SSC MTS EXAM

Detailed explanation-1: -(A) Coenzyme or metal ion that is tightly bound to enzyme protein is called a prosthetic group.

Detailed explanation-2: -Coenzymes usually originate from vitamins. They can bind tightly or loosely to an enzyme. Coenzymes that are tightly bound are known as prosthetic groups, whilst loosely bound coenzymes are called cosubstrates. This is because they actually bind and are released from the enzyme, much like a substrate molecule.

Detailed explanation-3: -Prosthetic groups are usually loosely bound to the apoenzyme. Cofactors help in carrying out reactions that standard enzymes cannot. Cofactors may be small organic compounds such as flavin or inorganic metal ions. The protein portion of the enzyme is known as apoenzyme.