Question

which term correctly names the process that converts ammonia first into nitrite and then into nitrate?
a. denitrification
b. nitrogen fixation
c. nitrification
d. ammonification

which group of bacteria performs the first step of converting ammonia into nitrite?
a. nitrite-oxidizing bacteria (nob)
b. ammonia-oxidizing bacteria (aob)
c. nitrogen-fixing bacteria
d. sulfate-reducing bacteria

which enzyme is mentioned as converting ammonia into hydroxyamine during the aob pathway?
a. nitrite oxidase
b. ammonia monooxygenase
c. hydroxyamine synthase
d. nitrate reductase

where are nitrifying bacteria commonly found, according to the video?
a. deserts with low moisture
b. sewage treatment plants, lakes, and rivers with high wastewater
c. inside human intestines
d. deep ocean trenches with no oxygen

Explanation:

1. Nitrification is the two-step process of oxidizing ammonia to nitrite then nitrate, while denitrification reverses this, nitrogen fixation converts atmospheric N₂ to ammonia, and ammonification breaks down organic nitrogen to ammonia.

2[LLM SSE On Failure]

Answer:

1. C. Nitrification
2. B. Ammonia-oxidizing bacteria (AOB)
3. B. Ammonia monooxygenase
4. B. Sewage treatment plants, lakes, and rivers with high wastewater