Question

Microorganisms that oxidise ammonia to nitrite
(A) Nitrosomonas
(B) Thiobacillus
(C) Nitrobacter
(D) Nitrosolobus
Choose the correct answer from the options given below:

• A. (A), (B) and (D) only.
• B. (A) and (D) only.
• C. (A), (B), (C) and (D).
• D. (B), (C) and (D) only.

Hint:

Nitrosomonas and Nitrosolobus convert ammonia to nitrite in nitrification.

Answer 1

The Correct Option is B

Ammonia is oxidized to nitrite by Nitrosomonas and Nitrosolobus. Nitrobacter oxidizes nitrite to nitrate, and Thiobacillus is a sulfur-oxidizing bacterium, not involved in nitrification.