NEET Biology question

Not in NEET syllabus

Which two distinct microbial processes are responsible for the release of fixed nitrogen as dinitrogen gas (N2) to the atmosphere?

(A)Aerobic nitrate oxidation and nitrite reduction
(B)Decomposition of organic nitrogen and conversion of dinitrogen to ammonium compounds
(C)Enteric fermentation in cattle and nitrogen fixation by *Rhizobium* in root nodules of legumes
(D)Anaerobic ammonium oxidation and denitrificationCorrect

Answer: (D)

Solution

Fixed nitrogen is released back to the atmosphere as N2 gas through two distinct microbial pathways: denitrification, in which bacteria such as *Pseudomonas denitrificans* reduce soil nitrate to N2 under anaerobic conditions; and anaerobic ammonium oxidation (anammox), in which ammonium is

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Question ID VK-112934