Which type of respiration produces the most ATP energy?

Aerobic respiration occurs in the mitochondria and involves glycolysis, the Krebs cycle, and the electron transport chain. It uses oxygen to fully oxidize glucose, resulting in a high yield of ATP.

Anaerobic respiration and fermentation occur in the absence of oxygen. Anaerobic respiration uses other electron acceptors instead of oxygen, while fermentation results in the partial breakdown of glucose, both producing significantly less ATP than aerobic respiration.