- 1(current)
Q. No.Hydroponics is
1. cultivation of plants in water
2. growth of plants towards water
3. growth of plants away from water
4. soilless cultivation of plants
Julius Von Sachs
Which of the following is not related?
1. A prominent German Botanist
2. In 1860, he demonstrated for the first time that plants could be grown to maturity in a defined nutrient solution in complete absence of soil
3. The technique, Hydroponics
4. Categorized the essential and non Essential mineral nutrition.
Hydroponics can be used in
1. Identification of essential elements
2. In discovery of deficiency symptoms of essential elements
3. For commercial production of vegetables
4. All of these
Apoplast is not associated with
1. Passive flux
2. Rapid
3. Uptake of ions into the free space or outer space of cells
4. Usually has no involvement of ion channels or transmembrane proteins which function as selective pore
Symplast is not associated with
1. Active flux
2. Slow
3. Uptake of ions through the cell
4. Usually has involvement of ion channels or transmembrane proteins which function as selective pore
Xylem sap has minerals is substantiated by
1. Heavy isotope of mineral element
2. Isobar of mineral element
3. Radioisotopes of mineral elements
4. Protium labelled isotope of mineral elements
In the given diagram of a typical set up for nutrient solution culture, the purpose of X is:
| 1. Addition of water 2. Addition of nutrients 3. Removal of wastes 4. Aeration |
 |
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 |
| 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
- 1(current)
Q. No.
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