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Q.

During N2-fixation by Rhizobium in soyabean, which one is incorrect?

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a

Leghaemoglobin is a pink coloured pigment.

b

Nitrogenase helps to convert N2 gas into two molecules of ammonia which requires 16 ATP.

c

Nitrogenase is an oxygen scavenger

d

Nitrogenase require anaerobic condition for its functioning.

answer is D.

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Detailed Solution

Leghaemoglobin is an oxygen-carrying pigment, it decreases the free oxygen concentration in root nodules to maintain anaerobic conditions required for nitrogenase activity, it is called an oxygen scavenger.

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