NEET Previous Year Question
Which of the following bacteria reduce nitrate in soil into nitrogen?
Topic: NEET PYQ
Answer: C. Full step-by-step solution below.
- ANitrobacter
- BNitrococcus
- CThiobacillus
- DNitrosomonas
Correct answer: C
Solution
(c) Denitrifying bacteria convert nitrates (NO₃⁻) in soil into nitrogen gas (N₂).Thiobacillus denitrificans is a well-known denitrifying bacterium that performs this process.
Other options:
• Nitrosomonas → ammonia → nitrite (nitrification)
• Nitrobacter → nitrite → nitrate (nitrification)
• Nitrococcus → also involved in nitrification
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