Nitrogen Metabolism

Nitrogen exists in the atmosphere as

Nitrogen exists in the atmosphere as diatomic nitrogen (N₂) with a triple covalent bond (N≡N) that makes it extremely stable and unreactive under norm

The nitrogen cycle is a continuous

The nitrogen cycle is a continuous process that converts atmospheric N₂ into biologically available forms and returns it back to the atmosphere. Key s

Abiological nitrogen fixation converts N₂

Abiological nitrogen fixation converts N₂ to ammonia without involving living cells. It occurs through two main processes: (1) Industrial fixation via

Biological nitrogen fixation is the enzymatic

Biological nitrogen fixation is the enzymatic reduction of N₂ to ammonia by specialized microorganisms containing the enzyme nitrogenase. Free-living

Symbiotic nitrogen fixation occurs when nitrogen

Symbiotic nitrogen fixation occurs when nitrogen-fixing microorganisms establish special relationships with other organisms. Key examples include: (1)