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Home Biotechnology Nitrogen Fixation and Photosynthesis Comments

  • Question
  • Organisms capable of converting N2 to NO3 are


  • Options
  • A. yeasts
  • B. bacteria
  • C. roundworms
  • D. moulds

  • Correct Answer
  • bacteria 


  • Nitrogen Fixation and Photosynthesis problems


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    • 1. Chlorophyll is associated with

    • Options
    • A. thylakoids
    • B. stroma
    • C. cristae
    • D. matrix
    • Discuss
    • 2. Which of the following bacteria genus is capable of oxidizing ammonia (NH4)?

    • Options
    • A. Nitrospina
    • B. Nitrobacter
    • C. Nitrosococcus
    • D. Nitrosobacter
    • Discuss
    • 3. 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
    • Discuss
    • 4. 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
    • 5. What is the metal ligand in chlorophylls?

    • Options
    • A. Copper (Cu)
    • B. Iron (Fe)
    • C. Magnesium (Mg)
    • D. Manganese (Mn)
    • Discuss
    • 6. 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
    • 7. In the presence of carbon monoxide, nitrogen fixation

    • Options
    • A. increases
    • B. decreases
    • C. inhibits
    • D. none of these
    • Discuss
    • 8. Nitrosomonous and Nitrobacter obtain their carbon for growth from

    • Options
    • A. organic compounds
    • B. carbon dioxide
    • C. elementary carbon
    • D. none of these
    • Discuss
    • 9. What type of long chain alcohol is esterified to plant chlorophyll molecules?

    • Options
    • A. Dolichol
    • B. Farnesol
    • C. Phytol
    • D. None of these
    • Discuss
    • 10. A group of about 300 chlorophyll molecule acting together to trap photons and transfer energy to the pigment molecule at the reaction center may be called as

    • Options
    • A. harvesting unit
    • B. reaction center
    • C. photosynthetic unit
    • D. chloromass
    • Discuss


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