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Mineral Nutrition Test - 26

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Mineral Nutrition Test - 26
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Appearance of brown spots surrounded by chlorotic veins is a prominent toxicity symptom of
    Solution
    Yellowing between the leaf veins i.e., chlorotic veins and browning of leaf edges or brown color spots are important deficiency symptoms of manganese. Manganese is an important requirement for the process of plant photosynthesis and hence it's deficiency is responsible for these symptoms.
  • Question 2
    1 / -0
    The deficiency of molybdenum induces
    Solution
    Cauliflower is very sensitive to deficiency of molybdenum. Molybdenum deficiency in acidic soil leads to improperly developed leaf blades in the shape of narrow straps.
  • Question 3
    1 / -0
    The cauliflower become brown due to deficiency of
    Solution
    Boron is an essential micronutrient for plants. Its deficiency leads to browning in cauliflower.
  • Question 4
    1 / -0
    Which of the following is widely used metal co factor?
    Solution
    • The dipositive ionic form of nickel is used as a co-factor by urease and other enzymes. 
    • Magnesium ion in dipositive form is required by kinases and phosphatases but in tripositive ionic form is not used by any enzyme. 
    • The rest of the ions listed are not commonly required for enzyme activity.

    So, the correct answer is option C.
  • Question 5
    1 / -0
    Deficiency of molybdenum causes
    Solution
    • Molybdenum is an essential micronutrient for plants. 
    • Molybdenum deficiency may induce symptoms similar to those of nitrogen deficiency, as molybdenum is required for the assimilation of nitrate taken up by the plant. 
    • Molybdenum is required for nitrate reduction. 
    • Mottling and necrosis of leaves are the most important deficiency symptoms.
  • Question 6
    1 / -0
    Boron in green plants assists in
    Solution
    Boron is a micronutrient which plays a key role in the development of plants and performs a variety of functions such as pollination, seed set, cell wall formation, maintenance of the structural and functional integrity of plant cells and movement of sugar or energy in the growing parts of the plants. The process of photosynthesis by green parts of the plant converts sunlight into chemical energy and forms sugars. But it is also essential that these sugars should be translocated to other parts of the plant. The rate of sugar transport in increased by the boron in growing regions and developing fruits. Theses sugars help in root growth in young plants and also in root nodule formation in leguminous plants. 
    Thus, the correct answer is option A. 
  • Question 7
    1 / -0
    Internal cork of apple fruit develops due to the deficiency of
    Solution
    Boron is a micronutrient which forms a component of plant cell wall and reproductive structures. Fruits such as apple show the formation of external as well as internal cork due to the deficiency of boron. External cork refers to the formation of surface spots while internal cork refers to the formation of lesions in the internal fleshy part. The external cork develops two weeks after petal fall and the spots appear water soaked at first. Later they become light brown and wrinkled with sap exudation from the surface. In mild cases of internal cork, there are no external symptoms but in severe form the external appearance of the fruit becomes rough. Internal cork affects the core area in which several brown corky spots of varying size appear.
    Thus, the correct answer is option D. 
  • Question 8
    1 / -0
    The minerals which are not involved in the photolysis of water are
  • Question 9
    1 / -0
    Elements which maintains the solubility of calcium in the cells
    Solution
    Calcium and boron are two important minerals which are required by the plants for their growth. Both show the synergistic relationship as calcium does not provide its many benefits in the absence of boron. It provides structural health to plants as it is required by plants cell wall and membranes. It promotes fruit quality, provides protection against heat stress and many diseases. But boron is another necessary micronutrient which supports the structural and functional integrity of plant cell membranes. 
    Thus, the correct answer is option D. 
  • Question 10
    1 / -0
    The elements arsenic, copper and mercury have which of the following effect?
    Solution
    All the elements show toxic effect. Hg causes mercury poisoning. A common disease is Minamata disease which occurs due to high exposure to methylmercury. Similarly, intake of arsenic-rich water results in thickened and darker skin, abdominal pain, vomiting and even leads to cancer. Intake of high doses of Zn leads to vomiting, nausea, cramps etc.
    Hence, option C is correct.  
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