| S.no | Photosynthesis | Respiration |
|---|---|---|
| 01 | Photosynthesis is the process where light energy is converted into chemical energy. | Respiration is the process where chemical energy converted into energy of ATP. |
| 02 | It occurs only in chlorophyll containing organisms. | It occurs in all organisms. |
| 03 | It requires light sources i.e. occur only in the presence of light. | It does not require a light source so it occurs throughout life. |
| 04 | It occurs in the chloroplast. | It occurs in the mitochondria. |
| 05 | The reactants are carbon dioxide and water. | Reactants are carbohydrates and oxygen usually. |
| 06 | Products are glucose and oxygen. | Products are carbon dioxide and water in the case of aerobic respiration. |
| S.no | Aerobic Respiration | Anaerobic Respiration |
|---|---|---|
| 01 | Oxygen is necessary for the oxidation. | Enzymes are used for oxidation. |
| 02 | Food is completely oxidised. | Food is partially oxidised. |
| 03 | Maximum quantity of energy is released. | Lesser quantity of energy is released. |
| 04 | Metabolic wastes are products. | Toxic substances like alcohol or lactic acid are produced. |
| 05 | It is found in most organisms. | It is found mostly in bacteria and fungi and endoparasites. |
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