First slide

Metabolism of Nitrogen

Question

Leghaemoglobin present in the nodules of leguminous plants helps in

Easy

A

Protecting the enzyme nitrogenase from molecular oxygen
B

Increasing ATP production in leguminous plants
C

Activating the NOD genes in Rhizobium
D

Secreting flavonoids by the leguminous plants

Solution

The enzyme nitrogenase is highly sensitive to the molecular oxygen; it requires anaerobic conditions. The nodules have adaptations that ensure that the enzyme is protected from oxygen. To protect these enzymes, the nodule contains an oxygen scavenger called leg-haemoglobin.

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