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  • ATP
    • formation
      • condensation of ADP (adenosine diphosphate) and Pi (inorganic ion)
      • catalysed by ATP synthase
      • during respiration and photosynthesis
    • structure
      • 1 molecule of ribose and adenine and 3 phosphate groups
      • adenosine triphosphate
    • Hydrolysis
      • ATP is an immediate source of energy
        • energy in ATP is stored in high energy bonds between phosphate groups
      • catalysed by ATP hydrolase
      • hydrolysis can be 'coupled' to other energy requiring reactions
        • energy released can be direct used to make the coupled reaction happen instead of being lost as heat
      • Pi released can be added to another compound (phosphorylation) which makes the compound more reactive
    • role
      • once made ATP diffuses to the part of the cell that needs energy
      • metabolic reactions
      • active transport
      • movement


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