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6.4: Enzymes- Biological Catalysts - Biology LibreTexts
A substance that helps a chemical reaction to occur is a catalyst, and the special molecules that catalyze biochemical reactions are called enzymes. Almost all enzymes are proteins, made up of chains of amino acids, and they perform the critical task of lowering the activation energies of chemical reactions inside the cell.
Lesson: Catalysts | KS3 Science | Oak National Academy
Catalysts are specific to particular reactions; different reactions require different catalysts. Enzymes are biological catalysts that speed up reactions in living cells. The catalyst is one of the reactants and gets used up during the reaction. Emphasise that the chemical reaction will take place without the catalyst but at a very slow rate.
5.1: Enzymes - Chemistry LibreTexts
2021年6月22日 · An enzyme is a biological catalyst, a substance that increases the rate of a chemical reaction without being changed or consumed in the reaction. A systematic process is used to name and classify enzymes.
4.1: Basic Principles of Catalysis - Biology LibreTexts
2024年3月21日 · Thanks to catalysis, reactions that can take hundreds of years to complete in the uncatalyzed “real world,” occur in seconds in the presence of a catalyst. Chemical catalysts, such as platinum, can speed reactions, but enzymes (which are simply super-catalysts with a “twist,” as we shall see) put chemical catalysts to shame (Figure 4.1).
8.5: Enzymes - Biological Catalysts - Chemistry LibreTexts
An enzyme is a biological catalyst, a substance that increases the rate of a chemical reaction without being changed or consumed in the reaction. A systematic process is used to name and classify enzymes. A substrate binds to a specific region on an enzyme known as the active site, where the substrate can be converted to product.