ATP summary

Basically just a summary of ATP using info from NELSON THORNES.

  • Created by: nasra
  • Created on: 08-04-15 03:12
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  • ATP
    • What is Energy?
      • Takes a variety of forms eg light, thermal, kinetic, electric
      • Can't be created or destroyed
      • Can be changed from one form to another
      • measured in joules (J)
    • Energy & metabolism
      • 1) Light converted into chemical energy (organic molecules)
      • 3) ATP used to perform work.
      • 2) Organic molecules converted to ATP during respiration.
    • How ATP stores energy?
      • It has 3 phosphate groups. These phosphate bonds have low activation energies so are easily broken. This is how energy is released.= Good energy donor.
      • Hydrolysis: ATP+H20-> ADP+Pi + ENERGY.
    • Roles of ATP
      • Not a good longterm energy store! Fats, carbs, glycogen much better. Its an immediate energy source
        • ATP releases less energy than glucose. Therefore its a better option. Released in small, manageable quantities than lots unlike lots of glucose.
        • Hydrolysis of ATP is a single reactions releasing immediate energy. Breakdown of glucose= longer reaction.
        • ATP can't be stored has to continuously be made in mitochondria. Cells e.g muscle fibres/epithelium of small intestine require energy for move and active transport have many larger mitochondria.
    • Why do organisms need energy?
      • Active Transport - provides energy to alter shape of carrier proteins in membranes.
      • Metabolism - provides energy for building  macromolecules from basic units.
      • Movement - energy for muscle contraction.
      • Maintenance, repair, division.
      • Production of substances / secretion - forming lysosomes
      • maintenance of body temp = birds n mammals are endothermic


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