what are catalysts and enzymes
Enzymes Are Catalysts. A catalyst is a chemical that increases the rate of a chemical reaction without itself being changed by the reaction. The fact that they aren't changed by participating in a reaction distinguishes catalysts fromsubstrates, which are the reactants on which catalysts work.
Enzymes allow many chemical reactions to occur within the homeostasis constraints of a living system. Enzymes function as organic catalysts. A catalyst is a chemical involved in, but not changed by, a chemical reaction. Many enzymes function by lowering the activation energy of reactions. By bringing the reactants closer together, chemical bonds may be weakened and reactions will proceed faster than without the catalyst.
Enzymes are catalytic proteins that speed up chemical reactions. Without enzymes, biological reactions would occur at a much slower rate or not at all. Like other proteins, enzymes are made of long chains of amino acids held together by peptide bonds. Enzyme Substrate Complex.