Glycolysis, Krebs cycle, Electron transport chain .In cellular respiration oxygen and glucose react and form ATP . water and carbon-dioxide are released as byproducts. These three stages of aerobic respiration.
Glucose which is the primary fuel for cellular respiration ,without that the process can't be started because there is no pyruvate for use in kerbs cycle in which NADH and carbon is formed.
Cellular respiration occur both aerobically (with oxygen) or aerobically (without oxygen). Anaerobic respiration is a normal part of cellular respiration. Glycolysis is first step in cellular respiration is anaerobic and does not require oxygen. If oxygen present then continue form kerb cycle and oxidative phosphorylation.
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