With regard to the Biological Nitrogen Fixation by Rhizobium in association with soyabean, which one of the following statement/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. 

Subtopic:  Nitrogen Fixation | Nodule formation |
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Identify a free living anaerobic nitrogen fixing microbe:

1. Azotobacter 2. Beijernickia
3. Nostoc 4. Rhodospirillum
Subtopic:  Nitrogen Fixation |
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Name the amino acid from which 17 other amino acids are formed by transamination in plants?

1. Glycine 2. Lysine
3. Tryptophan 4. Glutamic acid
Subtopic:  Nitrogen Fixation |
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