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Mineral Nutrition Test - 13

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Mineral Nutrition Test - 13
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Nitrogen is an important constituent of
    Solution
    Nitrogen is an important constituent of amino acids, where it is present as amino group bonded to alpha carbon atom. Proteins are biopolymers produced by joining together of amino acids through peptide bonds. Hence, nitrogen is an important constituent of proteins.
    So, the correct answer is 'Proteins'
  • Question 2
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    Which of the following is a microelement in plant?
    Solution
    Calcium, magnesium and nitrogen are required in large quantities and are hence, classified as macronutrients. Manganese is an essential micronutrient.
  • Question 3
    1 / -0
    Minerals in soil are actually derived from  
    Solution
    Soil is derived from weathering of rocks. Weathering can be physical (wind, water and other geological forces), chemical (oxidation, reduction and other chemical reactions) or biological (seed germination, growth of fungi, lichens and activity of microorganisms). Soil type depends on the rocks and climate of a region. As soil is derived from rocks, so the minerals present in soil also come from rocks which undergo weathering.
  • Question 4
    1 / -0
    The element required in maxium quantity by plants is 
    Solution
    The minerals required by plants in large quantity are called macronutrients whereas minerals required by plants in smaller quantity are called micronutrients.
    Carbon, hydrogen, oxygen, nitrogen, phosphorous and potassium are some of the essential macronutrients required by plants. Copper, iron, molybdenum, boron, zinc are the important micronutrients required by plants. Among the minerals listed in the question, nitrogen is required by plants in largest quantity.
  • Question 5
    1 / -0
    Which one of them is a micronutrient?
    Solution
    Depending on the amount required by plants, the essential mineral elements can be divided into two categories- macronutrients, which are required in larger quantity and micronutrients, which are required in lesser quantity. 
    Copper is an essential micronutrient required as a constituent of plastocyanin, cytochrome oxidase and activator of enzymes.
  • Question 6
    1 / -0
    The micronutrient least required by plants is
    Solution
    • Calcium and magnesium are macronutrients required in large quantities.
    • The micronutrients required in lesser amounts are zinc, copper, iron, manganese, nickel, molybdenum, chlorine, and boron. 
    • Nickel is a micronutrient required in the least amount among all micronutrients. In fact, it is not a widely accepted micronutrient.

    So, the correct answer is option B.
  • Question 7
    1 / -0
    The deficiencies of micronutrients, not only affect growth of plants but also vital functions such as photosynthesis and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most both photosynthesis and mitochondrial electron transport?

    Solution
    Copper, manganese and iron are important mineral constituents of proteins like cytochromes and flavoproteins, which take part in electron transport reactions of photosynthesis and mitochondrial electron flow. 
  • Question 8
    1 / -0
    Insectivorous plants usually grow in soil, which are deficient in
    Solution
    Nitrogen is the nutrient required by plants in high amounts. Insectivorous plants grow in nitrogen deficient soil and fulfil their nitrogen requirement by trapping small insects. These are green plants and synthesize their food and use small insects only to supplement their nitrogen requirement.
  • Question 9
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    Which one of the following can utilize molecular nitrogen $$(N_{2})$$ as nutrient for growth?
    Solution
    Rhizobium is rod shaped bacterium, which can directly use atmospheric nitrogen and reduce it to organic nitrogen with the help of enzyme nitrogenase. The reducing equivalents required for reducing nitrogen into ammonia are obtained from the host plant, where Rhizobium forms nodules.
  • Question 10
    1 / -0
    Produce from the hydroponic method have
    Solution
    The produce from hydroponics has longer shelf life as they are nutritionally superior to the normal plants. They are given nutrition directly into the solution and they hence direct all their energy into their growth and development instead of trying to find nutrients.
    So the correct answer is 'Long shelf life'.
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