During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by
1. Leghaemoglobin
2. Xanthophylls
3. Carotene
4. Cytochrome
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor its action, nitrogenase requires :
1. Light
2. Mn2+
3. Super oxygen radicals
4. High input of energy
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology1. oxygen removal
2. nodule differentiation
3. expression of nif gene
4. inhibition of nitrogenase activity
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLeguminous 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRoots of which plant contains a pink pigment which have affinity for oxygen :
1. Carrot
2. Soyabean
3. Mustard
4. Radish
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology