Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:
Select the correct statement about leghaemoglobin. (1) Leghaemoglobin is a source of energy (2) Leghaemoglobin is a pinkish coloured pigment found in the root nodules (3) Leghaemoglobin is activated by the presence of \[M{{g}^{2+}}\]ions (4) Leghaemoglobin protects the nitrogen fixing enzyme nitrogenase from oxygenA) 1, 2 and 3 are correct
B) 1 and 2 are correct
C) 2 and 4 are correct
D) 1 and 3 are correct
Correct Answer: C
Solution :
The root nodule cells of leguminous crops contain a red or pink coloured pigment called leghaemoglobin, which is similar to haemoglobin in its properties. This pigment helps in the process of nitrogen fixation by working as \[{{O}_{2}}\]scavenger thus creating anoxygenic condition which is necessary for \[{{N}_{3}}\]fixation. The anoxygenic state protects the nitrogen fixing enzyme nitrogenase from being oxidized.
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