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  • Enzymes
    • Enzymes are catalysts formed from living cells.
      • A catalyst is a substance which speeds up a chemical reaction without getting used up in it and it remains unchanged at the end of the reaction.
    • Enzymes are globular proteins
    • Temperature affects the reaction rates catalysed by enzymes.
      • Reacting molecules have more kinetic energy as temperature increases. This increases the chance of successful collisions taking place so the reaction rate increases.
      • The temperature at which an enzyme works best at is called its OPTIMUM TEMPERATURE
      • Too much heat destroys the activity of the enzyme as its structure begins to break down or denature
    • Enzymes are used in biotechnology baking, brewing, and milk industries


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