Question
Nitrogenase enzyme is a
magnesium-iron protein
molybdenum-iron protein
iron-copper protein
nickel-iron protein
Solution
B.
molybdenum-iron protein
Biological nitrogen fixation is catalyzed by nitrogenase, an enzyme composed of two component proteins called the Fe protein and the Mo-Fe protein. It is found in certain bacteria and blue-green algae. Some of these bacteria are free-living while others are symbiotic. It catalyses the conversion of atmospheric nitrogen to ammonia, the first stable product of nitrogen fixation. It is highly sensitive to the molecular oxygen.
