do nitrogen-fixation nodules contain large amounts of leghemoglobin?
A. It helps transport oxygen to the bacteria.
B. The nitrogenase enzyme interacts with the iron in the leghemoglobin.
C. The leghemoglobin helps break the triple bond of N2.
D. It stimulates the Nod factors.
E. It prevents carbon dioxide from inhibiting the nitrogenase enzyme.
A. It helps transport oxygen to the bacteria.
Leghemoglobin is hemoglobin produced by the legume plant. It is similar to human hemoglobin in structure and function. It carries oxygen to the rapidly respiring aerobic bacteria in the root, but it controls its availability so that nitrogenase activity is not affected.
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