| Respiration | Photorespiration |
| 1. Occurs in all aerobic and anaerobic organisms. | Occurs in C3 plants under high temperature, bright light, high oxygen and low CO3 concentration. |
| 2. A light independent process, occurs in both presence and absence of light. | A light dependent process, occurs in presence of Jight. |
| 3. Produce energy rich molecules like ATP, GTP, FADH2 , NADH2 | Do not produce energy rich molecules such as ATP. |
| 4. Respiration is an energy-producing process. | Photorespiration is an energy wastage process. |