Assertion :The enzyme nitrogenase is a Mo-Fe protein and catalyses the conversion of atmospheric nitrogen to ammonia. Reason: The enzyme nitrigenase is highly sensitive to the molecular oxygen.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Nitrogenases are enzymes produced by certain bacteria that are involved in the conversion of atmospheric nitrogen gas to ammonia. They play a major role in nitrogen fixation. This enzyme consists of two proteins- a homodimeric Fe protein and a heterodimeric Mo-Fe protein. This enzyme is highly sensitive to the molecular oxygen.
Thus, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.'

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