BIOMOLECULES AND ENZYMES

Detailed explanation-1: -A fundamental task of proteins is to act as enzymes-catalysts that increase the rate of virtually all the chemical reactions within cells. Although RNAs are capable of catalyzing some reactions, most biological reactions are catalyzed by proteins.

Detailed explanation-2: -Which statement is TRUE of enzyme catalysts? They lower the activation energy for the conversion of substrate to product.

Detailed explanation-3: -Explanation: The correct answer to this question is yes, enzymes are protein catalysts. In fact, the central role of enzymes-which are proteins or RNA-is to act as catalysts in biological reactions to increase the rate and speed of chemical reactions.

Detailed explanation-4: -The correct option is (a) They are highly specific in the reactions they catalyze. Enzymes are highly specific because they contain a three-dimensional substrate binding site that binds to the corresponding three-dimensional substrate molecule.