Question

Refer the given figure showing the bacteriods in the section of root nodule of a leguminous plant. Select the correct statement regarding A?

• A. It is leghaemoglobin, which protects nitrogenase from oxygen
• B. It protects bacteriods from nitrogenase
• C. It secretes chemical attractants that cause curling of root hair around nitrogen-fixing bacteria
• D. None of the above

Answer 1

The correct option is A It is leghaemoglobin, which protects nitrogenase from oxygen

Leg-haemoglobin is an oxygen scavenger which protects nitrogenase from oxygen. Because nitrogenase requires an anaerobic condition.

So the correct option is "It is leghaemoglobin, which protect nitrogenase from oxygen".