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Mineral Nutrition Test - 15

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Mineral Nutrition Test - 15
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Both nitrogen and sulphur are required by plants for
    Solution
    Nutrients are essential for the growth and development of organisms such as
    Chlorophyll synthesis- Magnesium
    Cell wall- Calcium 
    Stomatal Movements- Potassium
    Nitrogen and sulphur are needed for synthesis of co- enzyme-A and several other enzymes .
    Thus, the correct answer is option B.
  • Question 2
    1 / -0
    Magnesium is required for
    Solution
    Magnesium is required for synthesis for chlorophyll as it is present in the tetrapyrollic structure of chlorophyll complexes with the nitrogen atoms of four pyrrole rings. It is a macro nutrient. 
    Whereas zinc is for DNA replication, for RNA synthesis- Nitrogen and for stomatal movements- Potassium is required.
    Hence D) is the correct answer.
  • Question 3
    1 / -0
    Whiptail of crucifers is due to deficiency of
    Solution
    Whiptail of crucifers is due to deficiency of Mo. In this disease, lamina or upper half of lamina falls down.
    Hence, A is the correct answer.
  • Question 4
    1 / -0
    Gravel method of hydroponics is called as
    Solution
    Solid medium culture is where plants or micro organisms are grown on a solid support like agar gel, etc.
    Hydroculture involves the growth of plants in a nutrient solution with some solid support such as gravel or clay.
    So the correct answer is 'Hydroculture'.
  • Question 5
    1 / -0
    Root nodules are found in
    Solution
    Leguminous plants are in symbiotic association with nitrogen-fixing bacteria like Rhizobium. These bacteria invade root hairs of leguminous plants and forms root nodules in which they fix nitrogen. Rood nodules are found in some other plants also apart from leguminous plants. A red pigment present in the root nodules of leguminous plants is known as leghaemoglobin. 
    Thus, the correct answer is 'Some leguminous plants and some other plants also.'
  • Question 6
    1 / -0
    A number of minerals like Ca, Mg and K are held over the surface of clay particles because the latter are
    Solution
    Yes the elements like Ca, Mg, K are held over clay particles as these elements possess the positive charge, $$Ca^ {+2}$ $, $$Mg^{+2}$$, $$K^{+1}$$  and clay particles bear negative charge, so due to the electrostatic attraction, these elements get attach to the clay particles.
    Hence the right option is A.
  • Question 7
    1 / -0
    Which one is not a micronutrient?
    Solution
    Mg is required in higher quantities by plants as it is a chief constituent of chlorophyll, magnesium pectate, activator of enzymes connected with phosphate transfer, binding of ribosomes. It is a macronutrient. (> 10 mmol/kg of dry matter requirement)
    Mo, B, Zn are micronutrients (< 10mmol/kg of dry weight requirement). 
    Hence, C is the correct option.
  • Question 8
    1 / -0
    Culturing of plants in water$$/$$ soil-less medium is
    Solution
    Culturing of plants in soil less medium is called hydroponics. Plants are raised in small tanks. They are filled with a solution containing appropriate quantities of all mineral elements. The solution is changed from time to time. It has a mechanism for aeration and circulation. Iron is added as Fe-EDTA otherwise it gets precipitated. EDTA is a chelating agent which keeps the metal ion in the soluble state. Hydroponics is useful in areas having thin, infertile and dry soils. Through this technique out of season fruits and vegetables can also be grown.
    Thus, the correct answer is option A.
  • Question 9
    1 / -0
    Which of the following is macronutrient?
    Solution
    Ca is a macronutrient as it is required in higher quantities by plants. It is a chief component of cell wall, present in the form of calcium pectate. It controls cell permeability and mitosis. It is required for the growth of apical meristem. It helps in translocation of carbohydrates and amino acids. Whereas, MO, Mn, Zn are micronutrients.
    Hence, A is the correct answer.
  • Question 10
    1 / -0
    Plants use zinc as
    Solution
    Zinc is an essential micronutrient. Plants absorb zinc from soil as $$Zn^{2+}$$ ions. Zinc is required everywhere in the body of plants. It activates various enzymes, especially carboxylases. It is also required in the synthesis of auxin.
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