LIFE SCIENCE

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: -An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process.

Detailed explanation-3: -Enzymes allow reactions to occur at the rate necessary for life. In animals, an important function of enzymes is to help digest food. Digestive enzymes speedup reactions that break down large molecules of carbohydrates, proteins, and fats into smaller molecule s the body can use.

Detailed explanation-4: -A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.