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JAMB Biology 1987 Question 49

Question 49

Nutrient Cycling

Nitrifying bacteria are important because they

  1. A.release nitrogen to the atmosphere
  2. B.convert atmospheric nitrogen to ammonia
  3. C.combine ammonia with nitrogen
  4. D.oxidize ammonium salts to nitrates.
Show the answer and explanation

Answer: D (oxidize ammonium salts to nitrates.)

Explanation

Nitrifying bacteria (Nitrosomonas and Nitrobacter) oxidise ammonium compounds to nitrites and then to nitrates, which plants can absorb.