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The three stages of cellular respiration are glycolysis, the Krebs  Cycle, and the electron transport chain. The first stage happens in  the cytoplasm while the last two occâ¦urs in the mitochondria. 1 person found this useful.
The final stage of cellular respiration is the electron transport chain (ETC). The ETC is a series of molecules embedded in the mitochondrial membrane. The first molecule accepts protons and electrons from the products of the Krebs Cycle. The electrons are passed from molecule to molecule and finally react with oxygen and protons to form water.