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Nutrition in Plants and Animals Test - 7

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Nutrition in Plants and Animals Test - 7
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following plants can fix nitrogen from air?
    Solution
    Pea plant can fix nitrogen from air.Nitrogen fixation is a process in which nitrogen (N2) in the atmosphere is converted into ammonium (NH4+) or nitrogen dioxide (NO2).
  • Question 2
    1 / -0
    Bilirubin and biliverdin are found in
    Solution
    Bilirubin and biliverdin are found in bile. Bilirubin is created by the activity of biliverdin reductase on biliverdin, a green tetrapyrrolic bile pigment that is also a product of heme catabolism. Bilirubin, when oxidized, reverts to become biliverdin once again.
  • Question 3
    1 / -0
    Which of the following is the most abundant element found in plants?
    Solution
    Carbon is the most abundant element found in plants.Plants acquire carbon from the atmosphere through photosynthesis.
  • Question 4
    1 / -0
    Among the following plant nutrients, which is a macronutrient?
    Solution
    Among the following plant nutrients, calcium is a macronutrient. Rest other options are micronutrients.
  • Question 5
    1 / -0
    Which of the following are the most abundant elements in the living cells?
    Solution
    C, H, O and N are the most abundant elements in the living cells.
  • Question 6
    1 / -0
    Which of the following is a macronutrient?
    Solution
    Ca is a macronutrient. Rest other options are micronutrients.
  • Question 7
    1 / -0
    Which of the following is not an essential micronutrient?
    Solution
    Nickel is a non essential micronutrient. Rest options are elements essential for plant growth which are needed in only very small (micro) quantities.
  • Question 8
    1 / -0
    Which of the following is a function of Mg and Fe in plants?
    Solution
    Mg and Fe helps in the synthesis of chlorophyll in plants.Chlorophyll is the molecule that absorbs sunlight and uses its energy to synthesise carbohydrates from CO2 and water. This process is known as photosynthesis and is the basis for sustaining the life processes of all plants.
  • Question 9
    1 / -0
    Grana are absent in the chloroplast of
    Solution
    Grana are absent in the chloroplast of algae.They have starch-accumulating structures called pyrenoids.
  • Question 10
    1 / -0
    Which of the following is the largest reservoir of nitrogen?
    Solution
    Air is the largest reservoir of nitrogen.
  • Question 11
    1 / -0
    Which of the following is required by plants for the active uptake of minerals?
    Solution
    Plants require expenditure of energy for the active uptake of minerals.It is in the form of ATP.
  • Question 12
    1 / -0
    Which of the following elements is useful in seed germination?
    Solution
    Boron is useful in seed germination. It is also essential for seed and cell wall formation.
  • Question 13
    1 / -0
    Which of the following functions is performed by the microelements in plants?
    Solution
    Microelements in plants act as cofactors of enzymes.they are boron (B), chlorine (Cl), manganese (Mn), iron (Fe), zinc (Zn), copper (Cu), molybdenum (Mo), nickel (Ni).
  • Question 14
    1 / -0
    Which of the following elements is essential for root growth?
    Solution
    The mineral element calcium is essential for root growth. It is one of the macronutrient.
  • Question 15
    1 / -0
    Deficiency of which element causes premature leaf fall in plants?
    Solution
    Deficiency of phosphorus causes premature leaf fall in plants.
  • Question 16
    1 / -0
    Which of the following enzymes is required for nitrogen fixation?
    Solution
    The enzyme nitrogenase is required for nitrogen fixation.All nitrogenases have an iron- and sulfur-containing cofactor that includes a heterometal complex in the active site (e.g., FeMoCo).
  • Question 17
    1 / -0
    In which of the following processes are minerals absorbed?
    Solution
    Minerals are absorbed by the process of active transport. Active transport is the movement of molecules across a cell membrane in the direction against their concentration gradient, i.e. moving from an area of lower concentration to an area of higher concentration.
  • Question 18
    1 / -0
    Which of the following is a nitrogen fixing bacterium?
    Solution
    Rhizobium is a nitrogen fixing bacterium.they are Gram-negative, motile, non-sporulating rods.
  • Question 19
    1 / -0
    What do you call the process of conversion of ammonia to nitrite by microbes?
    Solution
    The process of conversion of ammonia to nitrite by microbes is called nitrification.The transformation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.
  • Question 20
    1 / -0
    Which of the following ions controls the stomatal movement in plants?
    Solution
    K+ ions controls the stomatal movement in plants. Basically Opening and closure of the stomatal pore is mediated by changes in the turgor pressure of the two guard cells.
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