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Home Biotechnology Nitrogen Fixation and Photosynthesis Comments

  • Question
  • During nitrogen fixation the enzyme nitrogenase catalyse the reaction. The reaction is high energy demanding which require approximately


  • Options
  • A. 12 ATP
  • B. 18 ATP
  • C. 25 ATP
  • D. 7 ATP

  • Correct Answer
  • 18 ATP 


  • Nitrogen Fixation and Photosynthesis problems


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    • 1. Which of the following molecule is produced from the fixation of CO2 in C4 plants?

    • Options
    • A. Malate
    • B. Oxaloacetate
    • C. Pyruvate
    • D. Alpha-ketoglutarate
    • Discuss
    • 2. What is the metal ligand in chlorophylls?

    • Options
    • A. Copper (Cu)
    • B. Iron (Fe)
    • C. Magnesium (Mg)
    • D. Manganese (Mn)
    • Discuss
    • 3. In the Calvin cycle of C3 plants, which molecule is the acceptor of CO2?

    • Options
    • A. Erythrose-4-phosphate
    • B. Ribulose-l,5-diphosphate
    • C. Ribose-5-phosphate
    • D. Alpha-ketoglutarate
    • Discuss
    • 4. A major plant macronutrient found in nucleic acids and proteins is

    • Options
    • A. calcium
    • B. nitrogen
    • C. sulphur
    • D. iron
    • Discuss
    • 5. Which of the following aid plants in the acquisition of nitrogen from nitrogen gas of the atmosphere?

    • Options
    • A. Bacteria
    • B. Algae
    • C. Nematodes
    • D. Moulds
    • Discuss
    • 6. Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?

    • Options
    • A. Nitrospina
    • B. Nitrobacter
    • C. Nitrosococcus
    • D. Nitrosobacter
    • Discuss
    • 7. Chlorophyll is associated with

    • Options
    • A. thylakoids
    • B. stroma
    • C. cristae
    • D. matrix
    • Discuss
    • 8. Organisms capable of converting N2 to NO3 are

    • Options
    • A. yeasts
    • B. bacteria
    • C. roundworms
    • D. moulds
    • Discuss
    • 9. The chief source of nitrogen for green plants is

    • Options
    • A. atmospheric nitrogen
    • B. nitrates
    • C. ammonium salts
    • D. low molecular weight- organic nitrogenous compound
    • Discuss
    • 10. In the presence of carbon monoxide, nitrogen fixation

    • Options
    • A. increases
    • B. decreases
    • C. inhibits
    • D. none of these
    • Discuss


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