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 Multiple Choice QuestionsMultiple Choice Questions

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1.

The plant ash is an indication of :

  • organic matter of plant

  • waste product

  • mineral salts absorbed by plants

  • none of these


2.

A metal ion involved in stomatal regulation is :

  • iron

  • potassium

  • zinc

  • magnesium


3.

The non- photosynthetic, non- symbiotic N2 fixing bacteria are

  • Rhodobacter

  • Spirillum

  • Azotobacter

  • All of these


4.

Lathyrism is caused by

  • dal

  • moth dal

  • khesari dal

  • Glycine


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5.

Sulphur is an important nutrient for optimum growth and productivity in

  • pulse crops

  • cereals

  • fibre crops

  • fibre crops

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6.

Assertion: Nitrogen-fixing bacteria in legume root nodules survive in oxygen-depleted cells of nodules.

Reason: Legheamoglobin completely removes oxygen from the nodule cells.

  • 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.


7.

Hydroponics is a

  • soilless culture

  • airless culture

  • waterless culture

  • none of these


8.

Hydroponics is

  • cultivation of plants in water

  • growth of plants towards water

  • growth of plants away from water

  • soil less cultivation of plants


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9.

Which one of the following elements is almost non-essential for plants?

  • Ca

  • Mo

  • Zn

  • Na


10.

Which of the following element plays an important role in nitrogen fixation

  • Zinc

  • Molybdenum

  • Manganese

  • Copper


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