Because of the high requirement for reducing power in nitrogen fixation,the nitrogenase enzyme that carries out the reaction is very sensitive to the presence of

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Nitrogenase enzyme is very sensitive to the presence of oxygen, as the enzyme contains an iron-sulfur cluster that can be damaged by oxygen. Nitrogen fixation occurs anaerobically in specialized cells or structures called heterocysts or in symbiotic associations with oxygen-scavenging bacteria. Light and carbon dioxide do not have a direct effect on the sensitivity of nitrogenase enzyme.

Because of the High Requirement for Reducing Power in Nitrogen