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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. 1  Glycolysis is the first stage of cell respiration and involves the breakdown of glucose (6C) into two molecules of pyruvate (3C). 2  It is an anaerobic reaction (does not require the presence of oxygen) and occurs in the cytoplasm.