IB DP Biology: SL复习笔记2.7.3 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