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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.
Glycolysis is the first stage of cellular respiration that involves the breaking down of glucose into smaller molecules to produce ATP (cellular energy). Glycolysis occurs in the cytosol of all living organisms.