During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by

1. Leghaemoglobin

2. Xanthophylls

3. Carotene

4. Cytochrome

Subtopic:  Nodule formation |
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For its action, nitrogenase requires :
1.  Light
2.  Mn2+
3.  Super oxygen radicals
4.  High input of energy

Subtopic:  Nodule formation |
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The function of leghemoglobin in the root nodules of legumes is

1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity

Subtopic:  Nodule formation |
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Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation -

1. Nodules act as sites for nitrogen fixation

2. The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3

3. Nitrogenase is insensitive to oxygen

4. Leghaemoglobin scavenges oxygen and is pinkish in colour

Subtopic:  Nodule formation |
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Roots of which plant contains a pink pigment which have affinity for oxygen :
1.  Carrot
2.  Soyabean
3.  Mustard
4.  Radish

Subtopic:  Nodule formation |
To view explanation, please take trial in the course below.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology