NEET2013Zoology-Ecology
NEET 2013 Zoology Nitrogen Cycle MCQ Question
Type: MCQ-conceptual-Hard-Class 12
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 denitrification
Correct Answer
Option D
Detailed Explanation
Denitrification and anaerobic ammonium oxidation release nitrogen gas back into the atmosphere.
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