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All Physics Chemistry Botany Zoology

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Nitrite is oxidized to Nitrate by the bacterium

A. Nitrococcus B. Nitrosomonas C. Nitrobacter D. Thiobacillus

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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The nitrifying bacteria are

A. Photoautotroph B. Chemoautotroph C. Nitrotroph D. Organotroph

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Denitrification occurs in

A. Leaves B. Roots C. Soil D. Environment

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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The reduction of absorbed nitrate occurs

A. In leaves B. In roots C. In soil D. In air

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Denitrification is

A. Reduction of nitrate to nitrite B. Reduction of nitrate to nitrogen C. Reduction of nitrous to nitrite D. Reduction of nitrogen to ammonia

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Denitrification is carried by

A. Pesudomonas B. Thiobacillus C. Nitrobacter D. Both A and B

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Reduction of nitrogen to ammonia by living organisms is called as

A. Electrical Nitrogen Fixation B. Biological Nitrogen Fixation C. Industrial Nitrogen Fixation D. Both B and C

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Explanation

Page number-201

12.6 Metabolism of Nitrogen

12.6.1 Nitrogen Cycle

Mineral Nutrition

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Which of the following enzyme is exclusively in prokaryotes?

A. Nitrogenase B. Pyruvate kinase C. Glucokinase D. Enolase

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Explanation

Page number-202

12.6 Metabolism of Nitrogen

12.6.2 Biological Nitrogen Fixation

Mineral Nutrition

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Nitrogenase converts

A. Nitrate to Nitrite B. Nitrogen to Ammonia C. Nitrogen to Nitrite D. Nitrogen to Nitrate

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Explanation

Page number-202

12.6 Metabolism of Nitrogen

12.6.2 Biological Nitrogen Fixation

Mineral Nutrition

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Which of the following are not free living Nitrogen fixers?

A. Anabaena B. Nostoc C. Azotobacter D. Rhizobium

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Explanation

Page number-202

12.6 Metabolism of Nitrogen

12.6.2 Biological Nitrogen Fixation

Mineral Nutrition

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