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Mineral Nutrition

Multiple Choice Questions

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

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14.

Manganese is required in

nucleic acid synthesis
plant cell wall formation
photolysis of water during photosynthesis
photolysis of water during photosynthesis

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15.

Which of the following is a symbiotic nitrogen fixer?

Glomus
Azotobacter
Frankia
Frankia

422 Views

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

Manganese

Magnesium is required in leaves, growing areas of root and stem protein synthesis hence, withdrawn from ageing. It is a constituent of chlorophyll, middle lamella, and connects with phosphate transfer in respiration, binding of ribosomes and DNA and RNA synthesis.

Manganese activates enzymes of respiration, photosynthesis and nitrogen metabolism performing oxidation, reduction decarboxylation. photolysis of water etc.

Copper is an activator of plastocyanin cytochrome oxidase, RuBP carboxylase and many other enzymes. It functions in electron transfer, maintenance of carbohydrate/nitrogen balance, chlorophyll synthesis etc.

Calcium is a constituent of middle lamella, an activator of enzymes connected with chromosome formation and many aspects of metabolism.

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18.

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

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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?