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Q. No.Consider the two statements:
Statement I: Excess of manganese in higher plants may induce deficiency of iron.
Statement II: Manganese inhibits translocation of iron at apex.
1. Both Statement I and Statement II are correct and Statement II explains Statement I
2. Both Statement I and Statement II are correct but Statement II does not explain Statement I
3. Statement I is correct and Statement II is incorrect
4. Statement I is incorrect and Statement II is correct
Subtopic: Mineral Deficiency & Toxicity |
62%
From NCERT
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Dentrification is carried out by:
1. Thiobacillus and Pseudomonas
2. Nitrosomanas and Nitrobacter
3. Rhodospirillum and Azotobacter
4. Beijerinckia and Frankia
1. Thiobacillus and Pseudomonas
2. Nitrosomanas and Nitrobacter
3. Rhodospirillum and Azotobacter
4. Beijerinckia and Frankia
Subtopic: Nitrogen metabolism |
93%
From NCERT
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Frankia fixes atmospheric nitrogen:
| 1. | in the roots of non-leguminous plants like Alnus but unlike Rhizobium does not form any root nodules |
| 2. | in the roots of leguminous plants like Soybean but unlike Rhizobium does not form any root nodules |
| 3. | in the roots of non-leguminous plants like Alnus and like Rhizobium forms root nodules |
| 4. | in the roots of leguminous plants like Soybean and like Rhizobium forms root nodules |
Subtopic: Nitrogen Fixation |
66%
From NCERT
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Identify the incorrect statement regarding the development of root nodules in soyabean:
1. Rhizobium bacteria contact a susceptible root hair, divide near it
2. Successful infection of the root hair causes it to curl
3. Infected thread carries the bacteria to the inner cortex, the bacteria get modified into rod-shaped bacteroids and cause inner cortical and pericycle cells to divide which leads to nodule formation
4. A mature nodule is complete without any vascular tissues continuous with those of the root.
Subtopic: Nodule formation |
74%
From NCERT
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Match List-I with List-II
Choose the correct answer from the options given below :
| 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) |
Subtopic: Nodule formation |
89%
From NCERT
NEET - 2022
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Which of the following protects nitrogenase inside the root nodule of a leguminous plant ?
1. Catalase
2. leg haemoglobin
3. Transaminase
4. Glutamate dehydrogenase
1. Catalase
2. leg haemoglobin
3. Transaminase
4. Glutamate dehydrogenase
Subtopic: Nitrogen Fixation | Nodule formation |
89%
From NCERT
NEET - 2022
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Which of the following pair represents free living nitrogen fixing aerobic bacteria?
1. Rhizobium and Frankia
2. Azotobacter and Beijernickia
3. Anabaena and Rhodospirillum
4. Pseudomonas and Thiobacillus
1. Rhizobium and Frankia
2. Azotobacter and Beijernickia
3. Anabaena and Rhodospirillum
4. Pseudomonas and Thiobacillus
Subtopic: Nitrogen Fixation | Nodule formation |
72%
From NCERT
NEET - 2022
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In the given figure showing key components of the nitrogen cycle, identify I, II, III and IV:
| A. Industrial nitrogen fixation B. Electrical nitrogen fixation C. Denitrification D. Ammonification |
 |
| I | II | III | IV | |
| 1. | A | B | C | D |
| 2. | B | A | C | D |
| 3. | A | B | D | C |
| 4. | B | A | D | C |
Subtopic: Nitrogen Fixation |
77%
From NCERT
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The given figure shows a stage in development of root nodule in soyabean. What will be true?
I. A shows an infection thread through which the bacterial cells reach the inner cortex.
II. B shows the division of the cortex and the pericycle cells in the formation of root nodules.
I. A shows an infection thread through which the bacterial cells reach the inner cortex.
II. B shows the division of the cortex and the pericycle cells in the formation of root nodules.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
Subtopic: Nodule formation |
86%
From NCERT
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The diagram shows hydroponic plant production. What is true regarding the technique?
I. Tube in which the plants are grown should be straight and not on an incline as shown in the figure.
II. Roots of the plants are continuously bathed in the aerated nutrient solution as shown in the diagram.
I. Tube in which the plants are grown should be straight and not on an incline as shown in the figure.
II. Roots of the plants are continuously bathed in the aerated nutrient solution as shown in the diagram.
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
Subtopic: Hydroponics & Aeroponics |
69%
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