A) nitrogenase
B) haemoglobin
C) myoglobin
D) leghaemoglobin
Correct Answer: D
Solution :
Rhizobium (symbiotic bacterium) occurs in the root nodule of legume plant. Inside the root nodules it develops the ability to fix nitrogen. In root nodule cell bacteria or bacteroids lie in groups and surrounded by membrane of the host cell which is lined by a pinkish pigment called leghaemoglobin. The enzymes nitrogenas fixies the atmospheric nitrogen. Leghaemoglobin protect the nitrogenase from \[{{\text{O}}_{\text{2}}}\] Haemoglobin is a iron-containmg respiratory pigment in animals. It leads to transport of \[{{\text{O}}_{\text{2}}}\]
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