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: -Enzymes in our bodies are catalysts that speed up reactions by helping to lower the activation energy needed to start a reaction. Each enzyme molecule has a special place called the active site where another molecule, called the substrate, fits.

Detailed explanation-3: -They function as a catalyst that speeds up the reaction by lowering the activation energy. The enzyme accelerates a chemical reaction without changing its equilibrium, so it is called as a biocatalyst. They increase the rate of biochemical reactions in an organism.

Detailed explanation-4: -The reactant in an enzyme-catalyzed reaction is called a substrate.

Detailed explanation-5: -A catalyst is a molecule which can facilitate a chemical reaction without being consumed or changed. Virtually all chemical reactions taking place in a living cell require catalysts. Such biocatalysts are called enzymes.