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  • water
    • water is a metabolite
      • e.g. condensation and hydrolysis
        • hydrolysis: needs water to break bond
          • energy from ATP is released through hydrolysis
        • condensation: releases water when new bond formed
          • joining of amino acids
    • solvent
      • lots of important substances in metabolic reactions are ionic
      • water is polar and so the positive end of a water molecule will be attracted to the negative ion and visa versa
      • ions will ge totally surrounded by water molecules - they'll dissolve
    • high latent heat capacity
      • resists changes in temp
      • H bonds absorb a lot of energy so takes a lot of energy to heat up
      • useful for living organisms
        • temp is more stable than on land
        • water inside organisms is constant so they have a constant internal body temp
    • high latent heat vaporisation
      • provides cooling affect with little loss of water through evaporation
        • takes lots of energy to break H bonds
      • useful for living organisms
        • can use evaporation to cool down without losing too much water
    • strong cohesion
      • cohesion is the attraction between molecules of the same type.
        • water molecules are 'sticky' because they're polar
      • strong cohesion helps water flow so good for transport e.g. water travels up xylem in plants
      • high surface tension when in contact with air.
        • this is why it forms droplets
        • e.g. pond skates 'walk' on water


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