A) transports oxygen to the root nodule
B) acts as an oxygen scavenger
C) provides energy to the nitrogen fixing bacterium
D) acts as a catalyst in transamination
Correct Answer: B
Solution :
The root nodules in leguminous plants are pinkish due to presence of pigment leghaemoglobin. The cells of root nodules contain irregular polyhedral bacteria called bacteroids. Leghaemoglobin is located between bacteroids and surrounding host membrane. Leghaemoglobin is an oxygen scavanger and protect the nitrogen fixing enzyme nitrogenase.
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