Denitrification occurs in

  1. Leaves
  2. Roots
  3. Soil
  4. Environment
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Plants absorb which form of Nitrogen?

  1. Ammonia
  2. Nitrate
  3. Nitrite
  4. Nitrogen
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The reduction of absorbed nitrate occurs

  1. In leaves
  2. In roots
  3. In soil
  4. In air
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Denitrification is

  1. Reduction of nitrate to nitrite
  2. Reduction of nitrate to nitrogen
  3. Reduction of nitrous to nitrite
  4. Reduction of nitrogen to ammonia
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Denitrification is carried by

  1. Pesudomonas
  2. Thiobacillus
  3. Nitrobacter
  4. Both A and B
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Reduction of nitrogen to ammonia by living organisms is called as

  1. Electrical Nitrogen Fixation
  2. Biological Nitrogen Fixation
  3. Industrial Nitrogen Fixation
  4. Both B and C
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Which of the following enzyme is exclusively in prokaryotes?

  1. Nitrogenase
  2. Pyruvate kinase
  3. Glucokinase
  4. Enolase
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Nitrogenase converts

  1. Nitrate to Nitrite
  2. Nitrogen to Ammonia
  3. Nitrogen to Nitrite
  4. Nitrogen to Nitrate
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Which of the following are not free living Nitrogen fixers?

  1. Anabaena
  2. Nostoc
  3. Azotobacter
  4. Rhizobium
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Which of the following is symbiotic nitrogen fixer?

  1. Rhodospirillum
  2. Azotobacter
  3. Beijernickia
  4. Rhizobium
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