Question

what is nitrogen cycle? 5 mark ques

Answer 1

the nitrogen cycle is the biochemical cycle by which nitrogen is converted into multiple chemical forms as it circulated among the atmosphere

Answer 2

there are 5 steps in the nitrogen cycle

1)Nitrogen fixation
2)Assimilation
3)Ammonification
4)Nitrification
5)Denitrification
1)Nitrogen fixation
in this step nitrogen is fixed r by microorganisms to the soil and the fixation of nitrogen is done by symbiotic bacteria and some other microorganisms
2)Assimilation
in this  process the plants take up the nitrogen present in the soil for their own purpose and other organisms get nitrogen by consuming plants , ammino acids etc
3)Ammonification
When a plant or animal dies , the nitrogen will be in organic form and the microorganisms like bacteria or fungi convert the organic nitrogen into ammonia
4)Nitrification
In this step ammonium is converted into Nitrate by nitrifying bacteria and there are many reactions taking place dureing the conversion
5)Denitrification
In this process nitrate is converted into nitrogen gas which completes the nitrogen cycle