Quiz  /  Mineral Nutrition Class 11 MCQ Questions With Answers

  • 1. 
    An element playing important role in nitrogen fixation is

  • Molybdenum
  • Copper
  • Manganese
  • Zinc

  • 2. 
    Which one is the major constituent of proteins, nucleic acids, vitamins and hormones

  • P
  • N
  • K
  • S

  • 3. 
    The amount of macronutrients per kg of dry matter is –

  • 10 mmole
  • Above 10 mmole
  • Less than 10 mmole
  • 0.1 mg

  • 4. 
    Which is essential for the growth of root tip?

  • Zn
  • Fe
  • Ca
  • Mn

  • 5. 
    Mineral known to be required in large amounts for plant growth include:

  • Phosphorus, potassium, sulphur, calcium
  • Calcium, magnesium, manganese, copper
  • Potassium, phosphorus, selenium, boron
  • Magnesium, sulphur, iron, zinc

  • 6. 
    The free-living, anaerobic nitrogen-fixer is

  • Beijerinckia
  • Rhodospirillum
  • Rhizobium
  • Azotobacter

  • 7. 
    An immobile element in plants is

  • Calcium
  • Potassium
  • Nitrogen
  • Phosphorus

  • 8. 
    The cell of a root nodule in leguminous plant shows a rod shaped structure called ____________.

  • Bacteria
  • Infection thread
  • Bacteroid
  • Ureide

  • 9. 
    The common nitrogen-fixer in paddy fields is

  • Rhizobium
  • Azospirillum
  • Oscillatoria
  • Frankia

  • 10. 
    How many of the following organisms not fix the atmospheric nitrogen in free living condition? Frankia, Anabaena, Rhodospirillum, Bijernickia, Rhizobium, Azotobacter, Nostoc.

  • 2
  • 4
  • 5
  • 3

  • 11. 
    Hydrophonics is a system of growing plants in –

  • Soilless culture or solution cultures
  • Acidic soil
  • Soilless cultures with alkaline pH
  • Soilless culture with acidic pH

  • 12. 
    In which of the following all three are macronutrients?

  • Boron, zinc, manganese
  • Nitrogen, Calcium, Magnesium
  • Molybdenum, magnesium, manganese
  • Nitrogen, nickel, phosphorus

  • 13. 
    Nitrifying bacteria

  • Reduce nitrates to free nitrogen
  • Oxidize ammonia to nitrates
  • Convert free nitrogen to nitrogen compounds
  • Convert proteins into ammonia

  • 14. 
    Manganese is required for

  • Chlorophyll synthesis
  • Plant cell wall formation
  • Photolysis of water in photosynthesis
  • Nucleic acid synthesis

  • 15. 
    Which one of the following is not an essential mineral element for plants while the remaining three are?

  • Iron
  • Manganese
  • Cadmium
  • Phosphorus

  • 16. 
    Which of the following can fix nitrogen in nonleguminous plants ?

  • Rhodospirillum
  • Azotobacter
  • Frankia
  • Rhizobium

  • 17. 
    Which of the following choices is not one of the three plant macronutrients included in most fertilizers?

  • O
  • N
  • P
  • K

  • 18. 
    Which of the following elements is responsible for maintaining turgor in cells?

  • Potassium
  • Sodium
  • Magnesium
  • Calcium

  • 19. 
    Which one of the following elements in plants is not remobilised?

  • Sulphur
  • Phosphorus
  • Calcium
  • Potassium

  • 20. 
    The enzyme nitrogenase is extremely sensitive to :

  • Oxygen
  • Nitrogen
  • Hydrogen
  • Helium

  • 21. 
    Magnesium is component of

  • Chlorophyll
  • Enzymes
  • Florigen
  • Haemoglobin

  • 22. 
    Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation. Which one of the following statements is not correct during this process of nitrogen fixation?

  • Leghaemoglobin scavenges oxygen and it is pinkish in colour.
  • Nodules act as sites for nitrogen fixation.
  • The enzyme nitrogenase catalyses the conversion of atmospheric N2 to NH3 .
  • Nitrogenase is insensitive to oxygen.

  • 23. 
    Which one of the following elements in plants is not remobilized?

  • Calcium
  • Potassium
  • Sulphur
  • Phosphorus

  • 24. 
    Study the cycle shown below and select the option which gives the correct word for all the four blanks A, B, C and D

  • A: Nitrification, B: Ammonification, C: Animals, D: Plants
  • A: Denitrification, B: Ammonification, C: Plants, D: Animals
  • A: Nitrification, B: Denitrification, C: Animals, D: Plants
  • A: Denitrification, B: Nitrification, C: Plants, D: Animals

  • 25. 
    The first stable product of fixation of atmospheric nitrogen in leguminous plants is :

  • NO2–
  • Ammonia
  • NO3–
  • Glutamate
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