QQuestion
With which step of Nitrogen Cycle microbes like Nitrosomonas and Nitrobacter are associated?
(a) Nitrification
(b) Denitrification
(c) Nitrogen fixation
(d) Ammonification
✓Answer
(a) Nitrification.
Explanation:
Nitrosomonas and Nitrobacter are nitrifying bacteria involved in the nitrification phase of the nitrogen cycle. Nitrosomonas converts ammonium (NH₄⁺) to nitrite (NO₂⁻), and Nitrobacter further transforms nitrite (NO₂⁻) into nitrate (NO₃⁻). This process is essential for maintaining soil fertility and the proper balance of nitrogen availability for plant growth.
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