Biological Classification And System Of Classification Question 118
Question: The denitrification means
[DPMT 1990; CPMT 2003]
Options:
A) Reduction of $ NO_2 $ to ammonia form by bacteria in the soil
B) Oxidation of ammonia to nitrate form
C) Conversion of ammonia to amino acids
D) Conversion of ammonia and nitrates to gaseous nitrogen in the soil
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Answer:
Correct Answer: D
Solution:
Denitrification is the reduction step in the nitrogen cycle. In this step, biological conversion of nitrate to nitrogen gas, nitric oxide or nitrous oxide takes place.
These compounds are gaseous compounds and are not readily available for microbial growth; therefore they are typically released to the atmosphere.
Denitrifiers belong to several genera such as Pseudomonas, Bacillus, Spirillum, Cornebacterium, Cytophata, etc.
BETA
