Enzymes

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  • Created by: KateLB
  • Created on: 12-12-13 20:40
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  • Enzymes
    • Biological catalysts and are protein molecules made up of long chains of amino acids
    • Five important properties:
      • They are ALL proteins
      • Each enzyme controls one particular reaction
      • They can be used again and again
      • They are affected by temperature
      • They are affected by pH
    • Can build up or break down other molecules
    • Types of enzyme
      • Amylase
        • Produced by the salivary glands, pancreas and small intestine
        • Used in mouth and small intestine
        • Catalyses the breakdown of starch into sugars (glucose)
      • Protease
        • Produced by the stomach, pancreas and small intestine
        • Used in the stomach and small intestine
        • Catalyses the breakdown of protein foods into amino acids
      • Lipase
        • Produced by the pancreas and small intestine
        • Used in the small intestine
        • Breaks down fats and oils (lipids) into fatty acids and glycerol.
    • Hydrochloric acid
      • allows stomach protease enzymes to work effectively
      • Creates optimum pH conditions for enzymes
      • Produced and used by the stomach
    • Bile
      • Made in the liver, stored and secreted in the gall bladder.
      • Used in the small intestine
      • provide alkaline conditions for enzymes to work effectively in the small intestine

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