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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 Stages of Cellular Respiration 1. Glucose is converted to pyruvate producing a small amount of ATP and NADH. 2. When oxygen is present, pyruvate and NADH are used to m â¦ ake a large amount of ATP. When oxygen isn't present, pyruvate is converted to either lactate or ethanol and carbon dioxide.