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  • Aerobic respiration is the release of energy from glucose or another organic substrate in the presence of oxygen.
  • Anaerobic respiration generally occurs in lower organisms, such as bacteria and fungi.
  • The scheme of glycolysis was given by Gustav Embden, Otto Meyerhof and J. Parnas, and is often referred to as the EMP pathway, after the abbreviation of their last names.
  • Glycolysis is the first stage in the breakdown of glucose and is common to all organisms.
  • Citric Acid cycle was elucidated by the British biochemist, Hans Krebs, in 1937. The elucidation of this cycle explains how pyruvate is broken down to CO2 and H2O.
  • The energy released during the electron transport system is utilized in synthesizing ATP with the help of ATP synthase.
  • The carbon dioxide compensation point is reached when the amount of CO2 uptake is equal to that generated through respiration at a non-limiting light intensity. Net photosynthesis under these conditions is zero.
  • The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called respiratory quotient (RQ) or respiratory ratio.

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