Home › Quizzes › Biological Nitrogen Fixation and Nitrogen Cycle (AIPVT)

Biological Nitrogen Fixation and Nitrogen Cycle (AIPVT)

Questions on nitrogen fixation, nitrogenase enzyme, nitrogen-fixing bacteria, nitrification, denitrification, and symbiotic relationships in leguminous plants

15 Questions Published
Play Quiz Practise this topic out loud

Questions

Question 1 Multiple Choice (Single Answer)

Which nutritional type of organisms are nitrifying bacteria?

  1. Photoautotrophs
  2. Chemoautotrophs
  3. Heterotrophs
  4. Lithotrophs
Question 2 Multiple Choice (Single Answer)

Which of the following elements are present in nitrogenase metalloenzyme?

  1. Fe, Mn and Vd
  2. Fe, Mg and Vd
  3. Fe, Mo and Vd
  4. Fe, Ni and Vd
Question 3 Multiple Choice (Single Answer)

Which of the following acts as a competitive inhibitor of nitrogenase enzyme?

  1. Acetylene
  2. Carbon monoxide
  3. Dihydrogen
  4. Carbon sulfide
Question 4 Multiple Choice (Single Answer)

Which bacteria oxidises nitrite to nitrate?

  1. Nitrosomonas europaea
  2. Nitrobacter winogradsky
  3. Nitrosococcus nitrosus
  4. Azospirillum
Question 5 Multiple Choice (Single Answer)

For which of the following processes are the enzymes ammonia monooxygenase (AMO) and hydroxylamine oxidoreductase (HAO) required?

  1. Conversion of nitrates to gaseous nitrogen
  2. Conversion of nitrites to nitrates
  3. Conversion of ammonia to nitrite
  4. Reduction of nitric oxide to nitrous oxide
Question 6 Multiple Choice (Single Answer)

In which of the following processes are the species of Pseudomonas, Alkaligenes and Bacillus involved?

  1. Nitrification
  2. Ammonification
  3. Denitrification
  4. N2 fixation
Question 7 Multiple Choice (Single Answer)

Who discovered the nitrogen-fixing organisms?

  1. Hellringe
  2. Beijerinck
  3. Malpighi
  4. Hermann Wilfath
Question 8 Multiple Choice (Single Answer)

Which of the following is a free-living chemosynthetic nitrogen fixer?

  1. Azotoacter
  2. Chlorobium
  3. Desulfovibrio
  4. Anabena
Question 9 Multiple Choice (Single Answer)

Diazotrophs is the name given to a group of organisms. Who are these organisms and what is the function of these organisms?

  1. They are prokaryotes, which use N2 as an energy source.
  2. They are prokaryotes involved in nitrogen fixation.
  3. They are eukaryotes, which are involved in N2 fixation.
  4. Diazotrophs are prokaryotes involved in denitrification.
Question 10 Multiple Choice (Single Answer)

How many moles of ATP are used when one mole of nitrogen is fixed?

  1. 2
  2. 16
  3. 8
  4. 1
Question 11 Multiple Choice (Single Answer)

Which of the following free living anaerobic microorganisms acts as a nitrogen fixer?

  1. Azotobacter
  2. Beijerinckia
  3. Desulfovibrio
  4. Azospirillum
Question 12 Multiple Choice (Single Answer)

Which of the following fix the maximum amount of nitrogen?

  1. Forests and non-agricultural lands
  2. Seas
  3. Agricultural lands
  4. Industries
Question 13 Multiple Choice (Single Answer)

Root nodules in leguminous plant chickpea is formed by

  1. rhizobium
  2. bradyrhizobium
  3. frankia
  4. cyanobacteria
Question 14 Multiple Choice (Single Answer)

Where is leghaemoglobin produced?

  1. In bacterial cell
  2. In roots of a plant
  3. In nodules
  4. In root hairs
Question 15 Multiple Choice (Single Answer)

Match the following:

 
Leguminous plant Symbiotic bacteria
1. Pea a. R. melioti
2. Soya bean b. R. phaseoli
3. Alfalfa c. R. japonicum
4. Urad d. R. leguminosarum

  1. | ||
    |---|---|
    |1. Pea|a. R. phaseoli|
    |2. Soya bean|d. R. leguminosarum|
    |3. Alfalfa|b. R. phaseoli|
    |4. Urad|c. R. japonicum|

  2. | ||
    |---|---|
    |1. Pea|d. R. leguminosarum|
    |2. Soya bean|c. R. Japonicum|
    |3. Alfalfa|a. R. melioti|
    |4. Urad|b. R. phaseoli|

  3. | ||
    |---|---|
    |1. Pea|a. R. melioti|
    |2. Soya bean|d. R. leguminosarum|
    |3. Alfalfa|c. R. japonicum|
    |4. Urad|b. R.phaseoli|

  4. | ||
    |---|---|
    |1. Pea|b. R. phaseoli|
    |2. Soya bean|c. R. japonicum|
    |3. Alfalfa|d. R. leguminosarum|
    |4. Urad|a. R. melioti|
← Back to Quizzes