Cellular Respiration C6H12O6+6O2 -> 6CO2+6H20

There are three types of cellular respiration, the first is Glycolysis, then The Krebs Cycle. The third is The Electron Transport Chain.


  • First step in both Cellular Respiration and Fermentation.
  • Therefore Glycolysis occurs in both Aerobic and Anaerobic Reactions
  • takes place in the cytoplasm
  • It occurs in all living organisms (prokaryote & eukaryote)
  • 2 ATP are made
  • 2 NADH (just like prokaryote and eukaryote)

Glucose ---> Pyruvic Acid C6 H12 O6 ---> C3 H4 O3

The Krebs Cycle (Citric Acid Cycle)

  • 2nd Step in Cellular Respiration
  • Takes place in Matrix of Mitocondria
  • Pyruvic acid is broken down into Carbon Dioxide
  • 3 NADH are made
  • 2 FADH2 ( just like ATP & NADH ) are made
  • releases 2 more ATP

Electron Transport Chain

  • 3rd step in Cellular Respiration
  • NADH & FADH2 are used
  • High energy electrons that come from Krebs Cycle are used to convert ADP into ATP
  • Oxygen is a reactant and water is a product

ATP Production

  • Glycolysis - 2
  • Krebs Cycle - 2
  • Electron Transport Chain - 34
Aerobic Respiration is the Krebs Cycle and then The Electron Transport Chain

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