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 Multiple Choice QuestionsMultiple Choice Questions

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11.

which one of the following is not a micronutrient?

  • Molybdenum

  • Magnesium

  • Zinc

  • Zinc

475 Views

12.

The free-living, anaerobic nitrogen - fixer is 

  • Beijerinckia

  • Rhodospirillum

  • Rhizobium

  • Rhizobium

587 Views

13.

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

  • Leghaemoglobin scavenges oxygen and is pinkish in colour

  • Nodules act as a site for nitrogen fixation

  • The enzyme nitrogenase catalyse the conversion of atmospheric N2 to NH3

  • The enzyme nitrogenase catalyse the conversion of atmospheric N2 to NH3

578 Views

14.

Manganese is required in 

  • nucleic acid synthesis

  • plant cell wall formation

  • photolysis of water during photosynthesis

  • photolysis of water during photosynthesis

406 Views

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15.

Which of the following is a symbiotic nitrogen fixer?

  • Glomus

  • Azotobacter

  • Frankia

  • Frankia

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16.

Nitrogen-fixation in root nodules of Alnus is brought about by

  • Bradyrhizobium

  • Clostridium

  • Frankia

  • Frankia

591 Views

17.

The two subunits of ribosome remain united at a critical ion level of

  • Copper

  • Manganese

  • Manganese

  • Manganese

380 Views

18.

Which one of the following elements is not an essential micronutrient for plant growth?

  • Mn

  • Zn

  • Cu

  • Cu

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19.

Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following is likely to alleviate his symptoms?

  • Thiamine

  • Folic acid and cobalamine

  • Riboflavin

  • Riboflavin

652 Views

20.

Sulphur is an important nutrient for optimum growth and productivity in

  • pulse crops

  • cereals

  • fibre crops

  • fibre crops

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