Question

Ammonification (production of ammonia) takes place during the process of
A. Respiration
B. Photosynthesis
C. Fermentation
D. Nitrogen fixation
E. None of the above

Answer 1

Hint: Ammonification is a process of formation of Ammonia that is $NH^+_4$. Plants take nitrogen in the ionic form that is in the form of ammonia.

Complete Answer:
1) Respiration is a cellular process in which food is broken down in presence of oxygen to release energy. It is an intracellular process in which a Glucose molecule combines with the oxygen molecule to release stored chemical energy. The waste products of this reaction are carbon dioxide and water which are released by the cell. Respiration takes place in all living cells.

2) Photosynthesis is the process by which plants manufacture its food using carbon dioxide and water in the presence of Sunlight and chlorophyll. Carbon dioxide and water are the reactants for the reaction whereas sunlight provides the suitable temperature for the reaction to take place and chlorophyll is the green pigment which absorbs the sunlight. Photosynthesis takes place in plants which are having green pigment chlorophyll.

3) Fermentation is anaerobic respiration process which takes place without oxygen. Fermentation process is used in the manufacturing of vaccines, alcohol, vinegar etc.

4) Nitrogen fixation is a process which is must for a plant. Although ample amounts of Nitrogen are present in the atmosphere, plants cannot take it directly. This nitrogen needs to be converted into the form in which plants can absorb and utilize it for the formation of protein. There are various processes such as Natural (lightening), Industrial (NPK fertilizers), Biological (Rhizobium bacteria) etc. When bacteria convert atmospheric nitrogen to Ammonia then this process is called ammonification.

The correct answer is, “D”.

Note: Ammonification is the process of formation of ammonia which plants absorb whereas de-nitrification is the process of conversation of nitrates to nitrogen.