Q. No.The deficiency symptoms of iron, magnesium and calcium in plants may actually be due to the toxicity of
1. Potassium
2. Manganese
3. Iron
4. Chlorine
1. Potassium
2. Manganese
3. Iron
4. Chlorine
The criteria for essentiality of an element for a plant include all except:
1. It must be absolutely necessary for supporting normal growth and reproduction.
2. The requirement must be specific and not replaceable by another element.
3. It must be directly involved in the metabolism of the plant.
4. They must be present in the plants in a concentration in excess of 10 mmole/Kg of dry matter.
Identify the incorrectly matched pair:
| Mineral | Functions in plants | |
| 1. | Potassium | Opening and closing of stomata, Activation of enzymes |
| 2. | Magnesium | Maintenance of ribosome structure, Structure of chlorophyll |
| 3. | Boron | Pollen germination, Carbohydrate translocation |
| 4. | Molybdenum | Water splitting in photosynthesis, Nitrogen metabolism |
Which of the following is not related to Julius Von Sachs?
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 the 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. discovery of deficiency symptoms of essential elements
3. commercial production of vegetables
4. all of the above
Hydroponics cannot be used in the commercial production of vegetables such as
(1) Tomato
(2) Seedless cucumber
(3) Lettuce
(4) Pomegranate
Which of the following is the essential requirement of Hydroponics?
(1) Aeration to obtain the optimum growth
(2) Lage vessel
(3) Broader neck
(4) Cotton plugs for funnel adjustment
Which of the following statements is wrong?
1. There are techniques that are able to detect the minerals even at a very low concentration i.e. 10-8 g/mL.
2. Some plant species accumulate selenium while others gold.
3. Some plants growing near nuclear test sites take up radioactive strontium.
4. The criteria for the essentiality of an element completely depends upon the amount of the element.
Which of the following is not a criteria for the essentiality of an element?
(1) The element must be absolutely necessary for supporting normal growth and reproduction
(2) In the absence of element, the plant is not able to complete their life cycle or set the seeds
(3) The requirement of that element must be specific can be replacable by another element
(4) The element must be directly involved in metabolism
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