A) inhibition of nitrogenase activity
B) oxygen removal
C) nodule differentiation
D) expression of nif gene
Correct Answer: B
Solution :
The root nodule of legume contains enzyme nitrogenase and leghaemoglobin. Nitrogenase highly sensitive to the molecular oxygen and requires anaerobic conditions. The nodules have adaptation that ensure that the enzyme, is protected from oxygen to protect these enzyme the nodule contains an oxygen scavenger called leghaemoglobin.
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