IB DP Biology: SL复习笔记2.7.3 Aerobic Respiration

Aerobic Respiration

  • Aerobic cell respiration requires oxygen and gives a large yield of ATP from glucose
  • The presence of oxygen allows glucose to be broken down fully into carbon dioxide and water
  • This yields far more energy (approx. 36 ATP molecules) than anaerobic respiration (2 ATP molecules) per molecule of glucose
  • CO2 is a waste product and has to be excreted
    • Except in plants where it is used for photosynthesis
  • Water is a by-product and contributes to the organism's water needs
    • Some animals that live in deserts drink very little but survive on this water
  • Most of the reactions of aerobic respiration, in eukaryotes, take place in the mitochondria


Aerobic respiration releases energy during the reaction between glucose and oxygen

Comparing combustion and respiration

  • There are important similarities between the burning (combustion) of fuels and the two forms of  respiration
  • Both require oxygen and produce CO2 and water
  • Both release heat from the breakdown of chemical bonds in the fuel

Comparing Respiration and Combustion Table