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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.
Cellular respiration is comprises of three steps : Glycolysis : It occurs in cytoplasm of the cell. It is basically conversion of glucose molecule into pyruvate. Krebâs Cycle : It occurs in inner membrane of mitochondria where pyruvate formed by glycolysis is converted into carbon di oxide and water molecule.