Question

The function of leghaemoglobin during biological nitrogen fixation, in root nodules of legumes is to

• A. Convert atmospheric N${}_2$ to NH${}_3$
• B. Convert ammonia to nitrite
• C. Transport oxygen for activity of nitrogenase
• D. Protect nitrogenase from oxygen

Answer 1

The correct option is D Protect nitrogenase from oxygen

Leghaemoglobin is an oxygen scavanger. It combines with oxygen and protects nitrogenase, which catalyses the fixation of nitrogen under anaerobic conditions.