With regard to the Biological Nitrogen Fixation by Rhizobium in association with soybean, which one of the following statements does not hold true?
1
Nitrogenase may require oxygen for its functioning.
2
Nitrogenase is MO- Fe protein
3
Leg-hemoglobin is a pink coloured pigment.
4
Nitrogenase helps to convert N2 gas into two molecules of ammonia.