Enzymes (Biology)

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  • Biology
    • Digestion
      • Starch, proteins, and fats are all big molecules.
        • The digestive enzymes break down the big molecules into the smaller ones.
        • Bile neutralises the stomach acids and emulsifies fats. Bile is produced in the liver, which is then stored in the gall bladder before being released into the small intestine.
      • Sugars, amino acids, glycerol, and fatty acids are all much smaller molecules.
      • Amylase converts starch into sugars. It is made in the salivary glands, the pancreas, and the small intestine.
      • Protease converts proteins into amino acids. It is made in the stomach, the pancreas, and the small intestine. (within the stomach it is called 'pepsin')
      • Lipase converts lipids into glycerol and fatty acids. It is made in the pancreas and the small intestine.
        • The hydrochloric acid in the stomach makes the pH level to acidic for enzymes in the small intestine to work properly. Bile is an alkaline - meaning it will neutralise the acids and make conditions alkaline. The enzymes in the small intestine work best in alkaline conditions.
      • Bile also emulsifies fats, meaning it breaks fats into tiny droplets giving a much bigger surface area of fat for the lipase to work on, making it's digestion faster.


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