Question

Conversion of organic nitrogen into ammonia, N2 gas into ammonia, nitrates into ammonia and ammonia into nitrates are respectively known as
A) Nitrogen fixation, nitrate reduction, nitrification, ammonification
B) Ammonification, nitrogen fixation, nitrate reduction, nitrification
C) Nitrification, ammonification, nitrogen fixation, nitrate reduction
D) Nitrogen fixation, nitrate reduction, denitrification, ammonification

Answer 1

Hint: The nitrification process was conducted by chemolithotrophic bacteria, nitrosomonas and nitrobacter, which is a mechanism of converting ammonia into nitrates.

Complete answer:
- The cycle of nitrogen defines how nitrogen flows between animals, bacteria, trees, the atmosphere and the earth's soil.
- The complexity of the nitrogen cycle is that nitrogen, approximately 78 percent of all air, is the most common gas in the Earth's atmosphere, but it cannot be used actively by animals and plants unless it is transformed into useful compounds.
- Its significance is due to its main role in nucleic and amino acid production. Adenosine triphosphate (ATP), which is the primary molecule of energy for living organisms, is also an integral part of this. It needs to change into different states via the nitrogen cycle for nitrogen to be utilised by plants and animals.

Now, let us find the solution from the options-
- Ammonification is a method of decomposition of organic nitrogen from dead plants and animals into ammonia.
- Nitrogen fixation is the mechanism by which nitrogen gas is converted to ammonia.
- Nitrate Reduction is the method of converting nitrate into ammonia. Nitrification is the mechanism by which ammonia is converted to nitrate.
So,' Ammonification, nitrogen fixation, nitrate reduction, nitrification' is the right option.

Thus, the correct answer is option (B).

Note: The first process of making nitrogen accessible to plants from the atmosphere is nitrogen fixation. Denitrification is the last stage in which nitrogen is returned to the atmosphere. The Rhizobium bacteria in the roots of legumes (clovers, soybeans, peas ) are an example of a nitrogen fixer, nitrification is carried out by nitrobacter, nitrococcus, and nitrosomonas, denitrification is anaerobic process and is carried out by the genus Paracoccus, Pseudomonas, and Bacillus are the bacteria concerned.