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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 can occur with or without oxygen. In the presence of oxygen, glycolysis is the first stage of cellular respiration. Without oxygen, glycolysis allows cells to make small amounts of ATP.This process is called fermentation.n the presence of oxygen, glycolysis is the first stage of cellular respiration. Without oxygen, glycolysis allows cells to make small amounts of ATP.