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Q. No.Which of the following is incorrect?
1. The inner boundary of the cortex, the endodermis, is impervious to water because of the presence of Casparian strip
2. The water movement through the root layers is ultimately symplastic in the endodermis
3. Pinus seeds cannot germinate and establish without the presence of mycorrhiza
4. The mycorrhizal fungi provides sugar and N-containing compounds to the plant root and in turn gets minerals and water from plant roots
Subtopic: Nitrogen Metabolism |
64%
From NCERT
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Which one of the following process is responsible for the release of \(N_2\) in the atmosphere?
1. Industrial Nitrogen fixation
2. Ammonification
3. Denitrification
4. Biological nitrogen fixation
Subtopic: Nitrogen Metabolism |
74%
From NCERT
NEET - 2022
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Which of the following pair of micronutrients would help in the light phase of photosynthesis to help in the reaction leading to oxygen evolution?
1. Zinc and Chlorine
2. Manganese and Molybdenum
3. Molybdenum and Iron
4. Manganese and Chlorine
Subtopic: Mineral Function |
76%
From NCERT
NEET - 2022
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Which of the following elements is incorrectly paired with its function in a plant?
1. nitrogen component of nucleic acids, proteins, hormones, coenzymes
2. magnesium component of chlorophyll; activates many enzymes
3. phosphorus component of nucleic acids, phospholipids, ATP, several coenzymes
4. sulfur component of DNA; activates some enzymes
1. nitrogen component of nucleic acids, proteins, hormones, coenzymes
2. magnesium component of chlorophyll; activates many enzymes
3. phosphorus component of nucleic acids, phospholipids, ATP, several coenzymes
4. sulfur component of DNA; activates some enzymes
Subtopic: Mineral Function |
72%
From NCERT
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In a root nodule, the gene coding for nitrogenase
1. is inactivated by leghemoglobin.
2. is absent in active bacteroids.
3. is found in the cells of the pericycle.
4. is part of the Rhizobium genome
1. is inactivated by leghemoglobin.
2. is absent in active bacteroids.
3. is found in the cells of the pericycle.
4. is part of the Rhizobium genome
Subtopic: Nodule formation |
50%
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Hints
Match List I with List II:
Choose the correct answer from the options given below:
1. A-IV, B-III, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-II, D-I
| List I | List II | ||
| A. | Manganese | I. | Pollen germination |
| B. | Potassium | II. | Chlorosis in older leaves |
| C. | Magnesium | III. | Necrosis |
| D. | Boron | IV. | Photosynthesis |
Choose the correct answer from the options given below:
1. A-IV, B-III, C-I, D-II
2. A-II, B-I, C-IV, D-III
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-II, D-I
Subtopic: Mineral Function |
52%
From NCERT
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Match List I with List II:
Choose the correct answer from the options given below:
1. A -III, B - IV, C-II, D - I
2. A -II, B - I, C-IV, D - III
3. A -II , B - IV, C-I, D - III
4. A -IV , B - II , C-III, D - I
| List-I | List-II | ||
| A. | Nitrification | I. | Azotobacter |
| B. | Denitrification | II. | Nitrotobacter |
| C. | Free-living nitrogen fixation | III. | Rhizobium |
| D. | Symbiotic nitrogen fixation | IV. | Pseudomonas |
Choose the correct answer from the options given below:
1. A -III, B - IV, C-II, D - I
2. A -II, B - I, C-IV, D - III
3. A -II , B - IV, C-I, D - III
4. A -IV , B - II , C-III, D - I
Subtopic: Nitrogen Fixation | Nitrogen Metabolism |
84%
From NCERT
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In root nodules of legumes, leg-haemoglobin is important because it:
1. Facilitates oxygen supply to the root nodule
2. Protects nitrogenase enzymes from denaturation
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination
1. Facilitates oxygen supply to the root nodule
2. Protects nitrogenase enzymes from denaturation
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination
Subtopic: Nitrogen Fixation | Nodule formation |
79%
From NCERT
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Hints
Please attempt this question first.
Match List I with List II
Choose the correct answer from the options given below
1. A-IV, B-I, C-III, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-III, B-II, C-IV, D-I
| List I | List II |
| A. Boron | I. Splitting of water during photosynthesis |
| B. Manganese | II. Synthesis of auxin |
| C. Molybdenum | III. Component of nitrogenase |
| D. Zinc | IV. Pollen germination |
Choose the correct answer from the options given below
1. A-IV, B-I, C-III, D-II
2. A-II, B-I, C-III, D-IV
3. A-II, B-III, C-I, D-IV
4. A-III, B-II, C-IV, D-I
Subtopic: Mineral Function |
90%
From NCERT
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Which of the following is not a ‘beneficial’ element required by higher plants?
1. Sodium
2. Silicon
3. Cobalt
4. Nickel
1. Sodium
2. Silicon
3. Cobalt
4. Nickel
Subtopic: Classification of Nutrients |
73%
From NCERT
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