Question Detail
Question
Which of the following soil micro-organisms changes protein in plant and animal remains into nitrates: A. Denitrifying bacteria B. Nitrifying bacteria C. Fungal moulds D. nitrogen-fixing bacteria
Correct Answer
Option B is the correct answer.
Detailed Explanation
Proteins in dead matter are first broken down into ammonia by decomposers (ammonification). Nitrifying bacteria then convert this ammonia into nitrites and then into nitrates, which plants can absorb.
Hint
These bacteria turn ammonia into plant food (nitrates).