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Nitrogen cycle
Saprobionts nitrogen fixing ammonification and nitrification
| Term | Definition |
|---|---|
| Why are micro organisms needed | They convert nitrogen gas into nitrogen containing substances that plants and animals absorb |
| Which biological molecules contain nitrogen | Proteins, ATP and nucleic acids |
| What are the key processes | Saphrobiotic nutrition and microbes ammonification Nitrification Nitrogen fixation Denitrification |
| How does nitrogen fixing occur in legumenous plants | Nitrogen fixing this is converting the nitrogen gas into a nitrogen containing compound This can be done through root nodules in plants as they have bacteria so they convert nitrogen gas into ammonia or nitrates |
| How does nitrogen fixing happen in soil | There is nitrogen fixing bacteria in the soil which can create ammonia which is ammonification. |
| Nitrification | Nitrifiying bacteria which convert ammonium into nitrites and they then convert nitrites into nitrates |
| What does denitrification do | This converts nitrates back into nitrogen gas |
| What happens to the nitrates once they made | They can be activley transported to plants and are assimilated into the cells to make amino acids ATP and DNA |
| What do saprobiotic bacteria do | These decompose proteins by secreting enzymes and recycle ammonia back into the ecosystem. |
Created by:
yHya