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  • enzymes
    • lock and key hypothesis
      • Enzymes are folded into complex 3D shapes that allow smaller molecules to fit into them.
      • The place where the molecules fit is called the
      • In the lock and key hypothesis, the shape of the active site matches the shape of its substrate molecules. This makes enzymes highly specific.
      • Each type of enzyme can usually catalyse only one type of reaction
    • enzymes are biological catalysts that control reactions in the body
    • enzymes are specific to its substrate and the activity of enzymes are effected by temp, substrate conc and pH
    • denaturing enzymes
      • If enzymes are exposed to extremes of pH or high temperatures the shape of their active site may change.
      • If this happens then the substrate will no longer fit into the enzymes.


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