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Question
Name the most crucial enzyme found in root nodules for N2 fixation? Does it require a special pink coloured pigment for its functioning? Elaborate.
Solution
Nitrogenase is the essential enzyme found in root nodules for nitrogen fixation. It requires a pink-coloured pigment called leghaemoglobin. Leghaemoglobin works as an oxygen scavenger and thus creates anaerobic conditions in the root nodule of a legume. Nitrogenase is highly sensitive to oxygen and needs anaerobic conditions to maintain its existence.
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