Biological Classification And System Of Classification Question 125
Question: The bacterial decomposition of nitrogenous organic compounds in the absence of abundant oxygen usually results in the formation of substance of offensive odour, chiefly sulphur compounds. Such anaerobic decomposition is called
Options:
A) Putrefaction
B) Nitrification
C) Denitrification
D) N2 fixation
Show Answer
Answer:
Correct Answer: A
Solution:
Nitrification, denitrification, and N2 fixation are all processes involved in the nitrogen cycle, but they do not typically result in the formation of sulphur compounds or substances with an offensive odour.
Nitrification (Option B) is the process by which ammonia is converted to nitrites ($NO_2^-$) and then nitrates ($NO_3^-$). Denitrification (Option C) is the process by which nitrates are reduced to produce nitrogen gas ($N_2$), returning nitrogen to the atmosphere. N2 fixation (Option D) is the process by which nitrogen gas from the atmosphere is converted into ammonia ($NH_3$) or related nitrogenous compounds in soil.
BETA
