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  3. Biology
  4. Nitrogen-fixation is inhibited by oxygen. However, in aerobic nitrogen-fixing bacteria, nitrogen is fixed in the presence of oxygen. Nitrogenase in such organisms is protected by which one of the following mechanisms?

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Q. Nitrogen-fixation is inhibited by oxygen. However, in aerobic nitrogen-fixing bacteria, nitrogen is fixed in the presence of oxygen. Nitrogenase in such organisms is protected by which one of the following mechanisms?

KVPYKVPY 2017

Solution:

Nitrogenases are enzymes used by some organisms to fix atmospheric nitrogen gas $\left( N _{2}\right)$. It is sensitive to oxygen thus is protected by removal of excess oxygen by organisms in their various metabolic activities.