environment medium MCQ

Denitrification in the nitrogen cycle is carried out by which type of bacteria?

  1. Nitrifying bacteria
  2. Nitrogen-fixing bacteria
  3. Denitrifying bacteria
  4. Ammonifying bacteria

Answer: Denitrifying bacteria

Denitrifying bacteria like Pseudomonas convert nitrates back to nitrogen gas (N2), releasing it into the atmosphere and completing the nitrogen cycle.

Topic Biogeochemical Cycles
Exam Relevance UPSC, SSC