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Question
Very Short Answer Question:
What is denitrification?
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Solution
Denitrification is the process in which anaerobic bacteria convert soil nitrates back into nitrogen gas.
Denitrifying bacteria removes fixed nitrogen i.e. nitrates from the ecosystem and returns it to the atmosphere in an inert form.
Denitrifying bacteria include Bacillus spp., Paracoccus spp. and Pseudomonas denitrificans. They transform nitrates to nitrous and nitric oxides and ultimately to gaseous nitrogen.
2NO3 → 2NO2 → 2NO → N2
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Blue green algae fix _________ directly from air to enhance fertility of soil.
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Long Answer Question:
Explain biological nitrogen fixation with example.
Write the role of nitrogenase enzyme in nitrogen fixation?
Free-living soil bacteria such as Pseudomonas sp. are responsible for the ______ process in the nitrogen cycle.
Nitrogen is an essential component of protein, DNA, and chlorophyll.
Assertion (A): Plants and animals can utilize atmospheric nitrogen.
Reason (R): The atmosphere is a rich source of nitrogen.
Name any two nitrifying bacteria in soil.
Nitrates of soil are also leached deep into the earth by ______.
