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:
The characteristic feature of leghaernoglobin are (1) it is a source of energy (2) it is a pinkish colour pigment found in nodules (3) activated by the presence of Mg2+ ions (4) it protects 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 :
Nodule cells of legumes contain a red or pink coloured pigment which is similar to haemoglobin in its properties called leghaemoglobin. The leghaemoglobin helps in the process of N2 fixation by working as C2 scavanger thus creating an oxygenic condition which is necessary for N2 fixation.
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