A) nitrification
B) nitrogen fixation
C) nitrite reduction
D) nitrate reduction
Correct Answer: B
Solution :
The fixation of nitrogen in root nodules of legumes takes place in the presence of the enzyme nitrogenase. This enzyme is an enzyme complex consisting of two components called as protein-1 and protein-2. The active nitrogenase complex contain protein-1 and protein-2 components in the ratio of 1 : 2.
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