Home Biology The Living World General If by radiation all nitrogenase enzyme are i…
Biology The Living World General Single Correct MCQ
Published on: August 13, 2026

If by radiation all nitrogenase enzyme are inactivated, then there will be no :-

A
Conversion from ammonium to nitrate in soil
B
Fixation of nitrogen in legumes
C
Fixation of atmospheric nitrogen
D
Conversion from nitrate to nitrite in legumes

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The correct answer is:
B

The enzyme nitrogenase is required, for the process of biological nitrogen fixation only. Fixation of atmospheric nitrogen occur through other route also. Neither nitrification (conversion of ammonium to nitrate) nor conversion of nitrate to nitrite require nitrogenase.

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