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A-Level Biology OCR A

Nitrogen Nitrogen Containing Molecule Micro Organisms Involved Cycle State

Microorganisms in the nitrogen cycle include Azotobacter and Rhizobium (converting N₂ and H₂ to NH₃), Nitrosomonas (converting NH₄⁺ to NO₂⁻), and Nitrobacter (converting NO₂⁻ to NO₃²⁻).

I microrganismi nel ciclo dell'azoto includono Azotobacter e Rhizobium (che convertono N₂ e H₂ in NH₃), Nitrosomonas (che converte NH₄⁺ in NO₂⁻) e Nitrobacter (che converte NO₂⁻ in NO₃²⁻).

Front Name the micro organisms involved in nitrogen cycle and state the nitrogen-containing molecule they use and the nitrogen-containing molecule they produce.
Back Microorganisms in nitrogen cycle:
  • Azotobacter (free-living) & Rhizobium (symbiosis in root nodules) N2 and H2 --> NH3
  • Nitrifying bacteria (Nitrosomonas) NH4+ --> NO2-
  • Nitrobacter NO2- --> NO32-

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