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Q. No.Which of the following plants may not be suited for cultivation on commercial scale by hydroponics?
1. Cucumber
2. Tomato
3. Lettuce
4. Wheat
Subtopic: Hydroponics & Aeroponics |
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If a plant is susceptible to a soil-borne pathogen, then which of the following methods is not apt for its growth?
1. Traditional farming
2. Hydroponics
3. Aeroponics
4. Soil-less culture
1. Traditional farming
2. Hydroponics
3. Aeroponics
4. Soil-less culture
Subtopic: Introduction |
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Subtopic: Classification of Nutrients |
76%
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Some functions of nutrient element are given below:
The concerned nutrient is
1. Cu
2. Fe
3. Ca
4. Mo
| I. | Important constituent of proteins involved in ETS. |
| II. | Activator of catalase. |
| III. | Important constituent of cytochrome. |
| IV. | Essential for chlorophyll synthesis. |
1. Cu
2. Fe
3. Ca
4. Mo
Subtopic: Mineral Function |
72%
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The first stable product of fixation of atmospheric nitrogen in leguminous plants is:
1. NO2
2. ammonia
3. NO3
4. Glutamate
1. NO2
2. ammonia
3. NO3
4. Glutamate
Subtopic: Nitrogen Fixation |
79%
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Subtopic: Classification of Nutrients |
81%
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Which of the following statements are correct?
1. (i), (ii), (iii)
2. (i), (ii), (iv)
3. (i) and (iv)
4. None of these
| i. | Solution culture/hydroponics contains all essential minerals except one, the usefulness of which is to be determined. |
| ii. | Na, Si, Co and selenium are beneficial element required by higher plants |
| iii. | Zn is the activator of nitrogenases while Mo is the activator of alcohol dehydrogenase. |
| iv. | Zn is needed for auxin synthesis. |
1. (i), (ii), (iii)
2. (i), (ii), (iv)
3. (i) and (iv)
4. None of these
Subtopic: Criteria for Essentiality of Elements | Hydroponics & Aeroponics | Mineral Function |
73%
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Which of the following parts of hydroponic plant help in the absorption of minerals and water?
1. Leaves
2. Axillary buds
3. Roots
4. Stem
1. Leaves
2. Axillary buds
3. Roots
4. Stem
Subtopic: Hydroponics & Aeroponics |
80%
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Given below are two statements:
| Assertion (A): | The energy required for the synthesis of ammonia by nitrogenase enzyme is obtained from the respiration of the host cells. |
| Reason (R): | Conversion of atmospheric nitrogen to ammonia eight ATPs for production of one NH3 molecule. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Ammonia Assimilation & Nitrogen Export |
62%
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Given below are two statements:
| Assertion (A): | Plants compete with microbes for the nitrogen that is available in the soil. |
| Reason (R): | Nitrogen is a limiting nutrient for both natural and agricultural ecosystems. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Introduction |
62%
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