- 1(current)
Q. No.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 gas into two molecules of ammonia.
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In plants with nitrogen fixing bacteria (such as alfalfa or soybeans), the presence of oxygen will poison the bacterium. Which of the following acts as a natural defense against oxygen toxicity by scavenging free oxygen in these systems?
| 1. Hemoglobin | 2. Myoglobin |
| 3. Leghemoglobin | 4. Methemoglobin |
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For biological fixation of one molecule of nitrogen into two molecules of ammonia, the number of ATP molecules needed is:
| 1. 4 | 2. 8 |
| 3. 12 | 4. 16 |
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- 1(current)
Q. No.
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