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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 First Stage of Cellular Respiration. The Second and Third Stages of Cellular Respiration (with oxygen present) The Fourth and Fifth Stages of Cellular Respiration (without oxygen present) Lactic Acid Fermentation: pyruvic acid + NADH ---> lactic acid + NAD positive and allows glycolysis to continue. Makes muscles sore and fatigued. Alcoholic fermentation: pyruvic acid + NADH ---> ethyl alcohol + CO2 + NAD positive.