Nitrogen Cycle
- Created by: Sophia Dowden
- Created on: 29-05-16 14:31
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- Nitrogen Cycle
- Nitrogen
- Plays a very important role in nature
- Needed to make amino acids and therefore proteins
- Forms part of the organic bases needed to make DNA and RNA
- Forms part of chlorophyll
- Forms part of NADP and ATP
- The nitrogen cycle is the flow of organic and inorganic nitrogen with an ecosystem
- ORGANIC --> INORGANIC
- E.g Proteins -> Amino acids/nitrates
- ORGANIC --> INORGANIC
- Main Process
- Nitrogen fixation
- Nitrogen (N2) ---> Nitrates (NO3)
- Forms through nitrogen fixation bacteria
- Azotobacter = living in the soil
- Rhizobium = living in root nodules of legume plants. Has a symbiotic relationship with plants.
- Bacteria gets food and shelter while the plants get ammonia ions produced by the rhizobium.
- Forms through nitrogen fixation bacteria
- Nitrogen (N2) ---> Nitrates (NO3)
- Ammonification
- Plant/animal remains decompose into Ammonia (NH3)
- OR
- Waste (faeces) decompose into ammonium ions (NH4+)
- OR
- Plant/animal remains decompose into Ammonia (NH3)
- Nitrification
- Ammonia (NH3) converts into Nitrites in the presence of the nitrifying bacteria nitrosomonas
- Nitrites (NO2-) turn into Nitrates (NO3-) in the presence of nitrobacter.
- Ammonia (NH3) converts into Nitrites in the presence of the nitrifying bacteria nitrosomonas
- Denitrification
- Ammonia (NH3) --------> Nitrogen gas (N2)
- Through the denitrifying bacteria (pseudomonas)
- Ammonia (NH3) --------> Nitrogen gas (N2)
- Nitrogen fixation
- Nitrogen
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