... broken down, therefore are three main stages of cellular respiration, the first stage is where glucose is broken down in the cytoplasm through glycolysis and is then converted into pyruvate , this produces a small amount of Adenosine Triphosphate (ATP) and NADH. This process can either be done aerobically (with oxygen) or anaerobically (without oxygen). In an aerobic process of cellular respiration the stage two is when pyruvate and NADH are both used to make ATP, however when this is done anaerobically the pyruvate is converted into either ethanol and carbon dioxide or lactate this is done through fermentation. Cellular Respiration can be seen more simply in the chemical equation: (2) The equation in words: Glucose is needed to start glycolysis, and the oxygen is needed for the glycolysis to move through the Krebs cycle or go though fermentation. Through the use of enzymes carbon dioxide is produced and released from the six carbon ...

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