Mineral Nutrition

Multiple Choice Questions

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Which of the following is correct set of micronutrient for plants?

  • Mg, Si, Fe, Cu, Ca

  • Cu, Fe, Zn, B, Mn

  • Mg, Fe, Zn, B, Mn

  • Mo, Zn, Cl, Mg, Ca

B.

Cu, Fe, Zn, B, Mn

Plants require nutrients for proper growth and development. There are 16 elements which are required for plant and are termed as essential elements. They are as follows:

Carbon (C), Hydrogen (H), Oxygen (O), Nitrogen (N), Phosphorus (P), Sulphur (S), Potassium (K), Magnesium (Mg), Calcium (Ca), Iron (Fe), Copper (Cu), Boron (B), Zinc (Zn), Manganese (Mn), Molybdenum (Mo) and Chlorine (Cl).

The essential elements are categorised into 2 groups, 

  1. Macro- nutrients: These are required by plants in large quantities. eg, C, H, O, N, S, P, K, Ca and Mg.
  2. Micro- nutrients: These are required by plants in very small quantities. eg, Fe, Cu, B, Mn, Ni, Mo and Cl.

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    Which of the following sugars is not plants?

    • sucrose

    • glucose

    • lactose

    • fructose

    Answer

    In the given diagram A and B represent

    •              A               B
      Mineralisation Demineralisation
    •              A               B
      Ammonification Denitrification
    •              A               B
      Denitrification Ammonification
    •              A               B
      Denitrification Mineralisation
    Answer

    Which among the following is a rootless plant?

    • Nymphaea

    • Sagittaria

    • Ceratophyllum

    • Vallisneria

    Answer

    The function of leghaemoglobin during biological nitrogen fixation in root nodules of legumes is to

    • convert atmospheric N2 to NH3

    • convert ammonia to nitrite

    • transport oxygen for activity of nitrogenase

    • protect nitrogenase from oxygen

    Answer
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    Assertion : Plants absorb sulphur in the form of sulphate ions.

    Reason : Sulphur bacteria are required for the formation of sulphate.

    • If both assertion and reason are true and reason is the correct explanation of assertion

    • If both assertion and reason are true but reason is not the correct explanation of assertion

    • If assertion is true but reason is false

    • If both assertion and reason are false

    Answer

    Which one of the following is not a microelement for plants?

    • Cu

    • B

    • Zn

    • Cr

    Answer

    Hydroponics is

    • nutrient less culture

    • water less culture

    • soilless culture

    • none of these

    Answer

    Leghaemoglobin helps in

    • imparting colour to floral petals

    • protecting nitrogenase from O2

    • destroying bacteria

    • transport of food in plants

    Answer
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    Animals take phosphorus from

    • water

    • plants

    • rock

    • soil

    Answer
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