Definition & key points of Nitrogen Metabolism
| TERMS | DEFINITIONS |
| Nitrogen fixation | The synthesis of organic nitrogenous compounds
from atmospheric nitrogen by certain microorganisms is called biological nitrogen fixation. |
| Asym biotic organism | The free living nitrogen fixing organisms are called are asymbiotic organisms. |
| Leghaemoglobin | The nodule is pink in colour. The pink colour is due to the presence of pigment leghaemoglobin. |
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