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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, the first stage of respiration, occurs in the cytoplasm. A molecule of glucose splits into two molecules of pyruvate. No oxygen is needed for this stage of respirâ¦ation and it occurs in cells that respire using mitochondria and cells that ferment sugars.