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Mineral Nutrition Test - 56

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Mineral Nutrition Test - 56
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  • Question 1
    1 / -0
    One mineral activates enzyme catalase and other is constituent of chlorophyll. They are respectively
    Solution
    Catalase is an enzyme that contains four iron heme groups that allows ito react with the hydrogen peroxide. Catalase is activated by iron. 
    Chlorophyll molecule contains a magnesium ion. Green plants are dependent on chlorophyll for photosynthesis, and magnesium is required for chlorophyll production. 
    Thus, the correct answer is option (A). 
  • Question 2
    1 / -0
    Free living nitrogen fixing aerobic bacterium is
    Solution
    • Rhodospirillum is a free-living nitrogen-fixing anaerobic bacteria.
    • Anabaena & Nostoc are symbiotic nitrogen-fixing cyanobacteria.
    • Beijerinikia is free-living nitrogen-fixing aerobic bacteria.
    • Rhizobium is symbiotic nitrogen-fixing aerobic bacteria but fixes nitrogen in anaerobic conditions.

      Hence the correct answer is D.
  • Question 3
    1 / -0
    Element related to nitrogen metabolism is
    Solution
    Molybdenum absorbs from the soil in the form of molybdate ions. It is a component of several enzymes, including nitrogenase and nitrate reductase, both of which participate in nitrogen metabolism. It is an essential element for nitrogen fixation. 
    So the correct answer is 'Molybdenum'.
  • Question 4
    1 / -0
    The process of conversion of nitrogen to ammonia by microbes is?
    Solution
    Nitrification is a microbial process by which reduced nitrogen compounds (primarily ammonia) are sequentially oxidized to nitrite and nitrate.
    Denitrification is a microbially facilitated process where nitrate is reduced and ultimately produces molecular nitrogen (N2).
    Nitrogen fixation is a process by which nitrogen in the Earth's atmosphere is converted into ammonia (NH3) or other molecules available to living organisms.
    The Haber process, is an artificial nitrogen fixation process and is the main industrial procedure for the production of ammonia.
    Thus, the correct answer is option (C). 
  • Question 5
    1 / -0
    Deficiency symptons of nitrogen and potassium are visible first in.
  • Question 6
    1 / -0
    Lecithin carrier theory of mineral absorption was proposed by.
  • Question 7
    1 / -0
    A protoplasmic element is
    Solution
    A protoplasmic element is an element which produces protoplasmic constituents like proteins, nucleic acids, chlorophyll, cytochromes, ferredoxin etc. Zinc is also a protoplasmic element. It is required everywhere in the plants. It activates various enzymes, especially carboxylase, and mainly required in the synthesis of auxin.
    So the correct answer is 'Zn'.
  • Question 8
    1 / -0
    A balancing element is?
  • Question 9
    1 / -0
    Boron helps plants in
    Solution
    Translocation is the movement of solutes from the leaf to various parts of the body. Sucrose is actively transpoterd from the source to the sink. As the sucrose moves down from the source the water potential decreases and thus water from the xylem enters the phloem. 
    Boron is a micronutrient which plays an important in growth and development of the plant. It helps in the formation of sugar complexes for translocation within plants. It enhances uptake of Ca, Mg, and K.
    So, the correct answer is option A.
  • Question 10
    1 / -0
    The most important element associated with protoplasm and proteinaceous materials of plants is
    Solution
    Nitrogen is the most essential mineral element. It forms an important component of the amino acid which combines to form protein. It is a non-metal element which is present in gaseous state. The atmospheric nitrogen is fixed by the nitrogen fixing bacteria like rhizobium into usable form like ammonia. It also helps in the growth and development of plant. Insectivorous plants are deficient in nitrogen. These adopt a heterotrophic mode of nutrition. These plants supplements their nitrogen supply through catching and digesting small animals like insects. It's deficiency causes chlorosis. It forms an important component of some of the important protoplasmic proteins like phosphoprotein and lipoprotein which provides structural and functional integrity to the cell.
    So, the correct answer is option A.
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