For plants the elements such as sodium, cobalt, silicon and selenium be best described as:
1. Beneficial elements
2. Toxic elements
3. Trace elements
4. Macronutrient elements
Subtopic: Â Criteria for Essentiality of Elements |Â Classification of Nutrients |
 81%
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Bacteria capable of carrying out reduction of nitrate present in the soil include:
1. Pseudomonas and Thiobacillus
2. Nitrosomanas and Nitrobacter
3. Nitrococcus and Nitrococcus
4. Rhizobium and Bradyrhizobium
1. Pseudomonas and Thiobacillus
2. Nitrosomanas and Nitrobacter
3. Nitrococcus and Nitrococcus
4. Rhizobium and Bradyrhizobium
Subtopic: Â Nitrogen metabolism |
 67%
From NCERT
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Which essential element required by plants is used in the synthesis of cell wall, formation of mitotic spindle and accumulates in older leaves?
1. Phosphorus
2. Magnesium
3. Calcium
4. Iron
1. Phosphorus
2. Magnesium
3. Calcium
4. Iron
Subtopic: Â Mineral Function |
 86%
From NCERT
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Alnus can grow in nutrient-poor soils, where few other trees thrive, because of its association with nitrogen fixing bacterium:
1. Anabaena
2. Rhizobium
3. Azotobacter
4. Frankia
1. Anabaena
2. Rhizobium
3. Azotobacter
4. Frankia
Subtopic: Â Nitrogen Fixation |
 78%
From NCERT
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Which element is an activator for the enzymes RuBisCo and PEP carboxylase?
1. Zinc
2. Magnesium
3. Potassium
4. Molybdenum
1. Zinc
2. Magnesium
3. Potassium
4. Molybdenum
Subtopic: Â Criteria for Essentiality of Elements |
 81%
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) | Manganese | (i) | Activates the enzyme catalase |
| (b) | Magnesium | (ii) | Required for pollen germination |
| (c) | Boron | (iii) | Activates enzymes of respiration |
| (d) | Iron | (iv) | Functions in splitting of water during photosynthesis |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iv) | (i) | (ii) | (iii) |
Subtopic: Â Mineral Function |
 72%
From NCERT
NEET - 2022
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NEET 2026 - Target Batch - Vital
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Which one of the following produces nitrogen fixing nodules on the roots of Alnus ??
1. Beijernickia
2. Rhizobium
3. Frankia
4. Rhodospirillum
1. Beijernickia
2. Rhizobium
3. Frankia
4. Rhodospirillum
Subtopic: Â Genetics & Biochemistry of Nitrogen Fixation |
 76%
From NCERT
NEET - 2022
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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
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: Â 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: Â Nitrogen Metabolism |
 73%
From NCERT
NEET - 2022
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NEET 2026 - Target Batch - Vital
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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: Â Mineral Function |
 75%
From NCERT
NEET - 2022
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