A) magnesium-iron protein
B) molybdenum-iron protein
C) iron-copper protein
D) nickel-iron protein
Correct Answer: B
Solution :
The enzyme nitrogenase is found in certain bacteria and blue-green algae. Some of these bacteria are free-living while others are symbiotic (in the anaerobic environment of roots of legume plants). This enzyme is a Mo-Fe protein and catalyses the conversion of atmospheric nitrogen to ammonia, the first stable product of nitrogen fixation. The enzyme nitrogenase is highly sensitive to the molecular oxygen.
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