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  • Created by: Jasmin
  • Created on: 19-10-13 18:40
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  • Enzymes
    • Structure
      • Globular
        • Protein chain is folded back on itself
      • Own sequence of AAs
        • Held in 3
          • By H bonds, disulphide bridges and ionic bonds
    • How enzymes work
      • Biological catalysts
      • CATABOLIC: large molecules break down into small molecules
      • ANABOLIC: Small molecules built into larger, more complex molecules
      • Lock and key theory
        • Enzymes react with another molecule - substrate
        • Own special shape -AS onto which substrate molecules bind
        • Enzyme and substrate are complementary to each other
        • Induced Fit Hypothesis
          • In the presence of substrate, the AS might change in order to select the substrates shape
    • Properties
      • Specific
        • Will catalyse only one particular reaction
      • For reactions to occur
        • Reactants must collide with sufficient energy to alter the arrangement of their atoms
          • Initial boost of energy called activation energy. Energy required to start the reaction
            • Enzymes lower the AE needed for a reaction to occur
              • By forming complexes with the substrate called the 'enzyme substrate complexes'


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