The enzyme nitrogenase is:

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(B) The enzyme nitrogenase is a $Mo-Fe$ protein complex that catalyzes the reduction of atmospheric nitrogen $(N_{2})$ to ammonia $(NH_{3})$. This enz

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Found in prokaryotes only

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(B) The enzyme nitrogenase is a $Mo-Fe$ protein complex that catalyzes the reduction of atmospheric nitrogen $(N_{2})$ to ammonia $(NH_{3})$. This enzyme is highly sensitive to molecular oxygen $(O_{2})$ and is found exclusively in prokaryotes (such as $Rhizobium$,$Azotobacter$,etc.). Therefore,the correct statement is that it is found in prokaryotes only.

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