• Created by: alexda
  • Created on: 25-02-15 20:17
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  • Enzymes
    • Enzymes are soluble protein molecules and are described as  biological catalysts.
      • A catalyst is a substance which increases the speed of a reaction by lowering the activation energy of the reaction. A catalyst does not change and is never used up in a reaction.
    • Enzymes catalyse chemical reactions inside and outside cells. For example:
    • Enzymes are highly specific for their substrate.
      • The substrate molecule has to fit the active site for a chemical reaction to be catalysed.
        • This is referred to as the 'lock and key' mechanism because just like only one key can open a lock, only one type of enzyme will catalyse a specific reaction.


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