ATP & Respiration

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  • Created by: khodnett
  • Created on: 03-03-16 11:13


  • nucleotide of organic base, adenine, 5 carbon sugar ribose and 3 phosphate groups.
  • the bonds between phosphates are unstable and easily broken to release energy by the enzyme ATPase
  • ATP + water -> Pi + energy
  • this is a reversible reaction 
  • ATP can be hydrolysed as required to release 30kj mol-1 energy

advantages of ATP

  • hydrolysis is a single reaction releasing immediate energy 
  • only one enzyme is needed
  • releases energy in small amounts when and where needed
  • universal energy source for many chemical reactions

roles of ATP

  • metabolic processes- building large complex molecules from simple ones
  • active transport- change the shape of carrier proteins in plamsa membranes 
  • movement- muscle contraction
  • nerve transmission- sodium-potassium pumps in the axon plasma membrane
  • secretion- packaging and transport of secretory products into vesicles

 aerobic respiration



initial stage in aerobic and anaerobic respiration

  • glucose activated by phosphorylation making it more reactive with 2 ATP. Provides energy to lower activation energy in enzyme reactions.
  • glucose converts to hexose phosphate. splits to 2 3c triose phosphates 
  • hydrogen removed from each and transferred to hydrogen carrier NAD to reduced NADH. triose phosphate converts to pyruvic acid. ATP


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