- 1(current)
Q. No.| List-I | List-II | ||
| (a) | Porins | (i) | Pink coloured nodules |
| (b) | leg haemoglobin | (ii) | Lumen of thylakoid |
| (c) | H+ accumulation | (iii) | Amphibolic pathway |
| (d) | Respiration | (iv) | Huge pores in outer membrane of mitochondria |
Choose the correct answer from the options given below :
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iv) | (iii) |
| 2. | (iv) | (i) | (ii) | (iii) |
| 3. | (iii) | (iv) | (ii) | (i) |
| 4. | (ii) | (iv) | (i) | (iii) |
1. Catalase
2. leg haemoglobin
3. Transaminase
4. Glutamate dehydrogenase
1. Rhizobium and Frankia
2. Azotobacter and Beijernickia
3. Anabaena and Rhodospirillum
4. Pseudomonas and Thiobacillus
During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by?
1. Leghaemoglobin
2. Xanthophylls
3. Carotene
4. Cytochrome
For its action, nitrogenase requires:
1. Light
2. Mn2+
3. Super oxygen radicals
4. High input of energy
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
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 |
Roots of which plant contains a pink pigment that has an affinity for oxygen:
1. Carrot
2. Soyabean
3. Mustard
4. Radish
- 1(current)
Q. No.
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