| Aerobic respiration | Anaerobic respiration |
| 1. Respiration which takes place in the presence of oxygen is called Aerobic respiration. | 1. Respiration which takes place in the absence of oxygen is called Anaerobic respiration. |
| 2. Carbon dioxide and water are formed. | 2. Carbondioxide and ethanol (or) lactic acid are produced. |
| 3. It has two stages. Glycolysis and Krebs cycle. | 3. It has two stages. Glycolysis and Fermentation. |
| 4. High amount of energy is released. | 4. Less amount of energy is released. |
| 5. It is seen mostly in all multicellular organisms. | 5. It is seen mostly in unicellular organisms like protozoans, bacteria and fungi. |
| 6. C6H12O6 + 6O2→ 6CO2 + 6H2 O + 686 K.cal | 6. C6H12O6 + 2C2H5OH + 2CO2 + 56 K.cal |