IB DP Biology: HL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