Differences between Aerobic and Anaerobic Respiration:

Aerobic Respiration	Anaerobic Respiration
1. Aerobic respiration takes place in the presence of free oxygen.	1. Anaerobic respiration takes place in the absence of free oxygen.
2. The first step of this process (glycolysis) takes place in cytoplasm while the second step (Krebs cycle) is carried out in mitochondria.	2. The complete process is carried out outside the mitochondria i.e., in the cytoplasm.
3. Glucose is completely oxidized into carbon dioxide and water.	3. Glucose is incompletely oxidized into carbon dioxide and ethyl alcohol.
4. 38 molecules of ATP are produced by the complete oxidation of one gram-mole of glucose.	4. Only 2 molecules of ATP are formed in this process.
5. Aerobic respiration occurs in most cells.	5. Anaerobic respiration occurs in bacteria, yeasts, some prokaryotes, erythrocytes (red blood cells), and in muscle cells.