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Chapter 13 Earth as a System: Energy, Matter, and Life - Part 5

In the context of the global nitrogen cycle, what precise metabolic process is performed by anaerobic ammonium oxidation...

Type: MCQ • Marks: 1
In the context of the global nitrogen cycle, what precise metabolic process is performed by anaerobic ammonium oxidation (anammox) bacteria?
Options
A. Fixation of N₂ into ammonia
B. Direct oxidation of ammonium (NH₄⁺) with nitrite (NO₂⁻) into dinitrogen gas (N₂)
C. Oxidation of organic proteins to nitrates
D. Reduction of nitrate to nitrite
Explanation
Anammox bacteria combine ammonium and nitrite anaerobically to produce inert N₂ gas, short-circuiting conventional nitrification-denitrification paths.
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Class 9th Science (MCQ)

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