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 Multiple Choice QuestionsMultiple Choice Questions

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1.

In which of the following, all three are macronutrients

  • Iron, copper, molybdenum

  • Molybdenum, magnesium, manganese

  • Nitrogen, nickel, phosphorous

  • Nitrogen, nickel, phosphorous

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2.

The first stable product of fixation of atmospheric nitrogen in leguminous plants is

  • NO2-

  • ammonia

  • NO3-

  • NO3-

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3.

During biological nitrogen fixation inactivation of nitrogenase by oxygen poisoning is prevented by

  • Leghaemogolobin

  • Xanthophyll

  • Carotene

  • Carotene

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4.

Best defined function of manganese in green plants is

  • Photolysis of water

  • Calvin cycle

  • Nitrogen fixation

  • Nitrogen fixation

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5.

Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin ‘A’ deficiency?

  • ‘Flaver Savr’ tomato

  • Canolla

  • Golden rice

  • Golden rice

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6.

For its action, nitrogenase requires

  • high input of energy

  • light

  • Mn2+

  • Mn2+

1244 Views

7.

Minerals known to be required in large amounts for plant growth include

  • phosphorus, potassium, sulphur, calcium

  • calcium, magnesium, manganese, copper

  • potassium, phosphorus, selenium, boron

  • potassium, phosphorus, selenium, boron

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8.

Which one of the following elements in plants is not remboilised?

  • Calcium

  • Potassium

  • Sulphur

  • Sulphur

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9.

Which one of the following is not an essential mineral elements for plants while the remaining three are?

  • Iron

  • Manganes

  • Cadmium

  • Cadmium

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10.

An element playing important role in nitrogen fixation is 

  • Molybdenum

  • copper

  • manganese

  • manganese

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