Enzyme required for nitrogen fixation is

Nitrogenase

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Nitroreductase

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Transaminase

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Transferase

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Solution

The correct option is A Nitrogenase
The fixation of nitrogen in root nodules of legumes takes place in the presence of the enzyme nitrogenase. This enzyme is an enzyme complex consisting of two components called protein 1 and protein 2. The active nitrogenase complex contains protein 1 and protein 2 components in the ratio of 1:2.
So, the correct answer is 'Nitrogenase'

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