Question

1. Why is nitrogen important for all living beings?
2. What is nitrogen fixation?

Answer 1

a. Nitrogen constitutes 78% of air by volume.

• It plays a very important role in plants, animals, and human beings as it is needed to prepare a vital nutrient “protein” which every living being needs for their growth.

b.Nitrogen fixation is the process by which the free nitrogen of air is converted into nitrogen compounds like nitrites and nitrates which are useful plant nutrients to produce growth.

• The reaction of nitrogen fixation is

${\mathrm{N}}_2\stackrel{\mathrm{nitrogenase}}{\to }{\mathrm{NH}}_3\to {\mathrm{NO}}_{2-}\to {\mathrm{NO}}_{3-}$