Photosynthesis: The Light-dependent Reactions

27 Questions | Total Attempts: 42

SettingsSettingsSettings
Please wait...
Photosynthesis Quizzes & Trivia

Questions and Answers
  • 1. 
    What metabolic reaction releases energy?
    • A. 

      Exothermic

    • B. 

      Endothermic

    • C. 

      Catalyst

  • 2. 
    What is the substance that increases the rate of areaction that would otherwise be too slow?
    • A. 

      Coupled reaction

    • B. 

      Catalyst

    • C. 

      Enzyme

  • 3. 
    What is the region on the enzyme where the reaction takes place?
    • A. 

      Catalyst

    • B. 

      Reactive site

    • C. 

      Active site

  • 4. 
    What is it called when enzymes link reactions that release energy to reactions that require energy?
    • A. 

      Exothermic reaciton

    • B. 

      Oxidation

    • C. 

      Coupled reaction

  • 5. 
    Each step in photosynthesis and respiration is mediated by what?
    • A. 

      Catalyse

    • B. 

      Oxygenase

    • C. 

      Enzymes

  • 6. 
    Check which are characteristics of oxidation
    • A. 

      Gain of electrons

    • B. 

      More C-H bonds

    • C. 

      More C-O bonds

    • D. 

      Loss of electrons

  • 7. 
    When an electron is removed, a proton may follow, with a result that a hydrogen ion is often (blank) during oxidation and (blank) during reduction.
    • A. 

      Added; removed

    • B. 

      Removed; added

    • C. 

      Added; added

  • 8. 
    Carbon dioxide diffuses through the stomatal pores and goes into solution in the thin film of water on the outside walls of the mesophyll cells.
    • A. 

      True

    • B. 

      False

  • 9. 
    What is the source of electrons used in photosynthesis?
    • A. 

      Carbon dioxide

    • B. 

      Water

    • C. 

      Glucose

  • 10. 
    What is the colorless fluid matrix which contains enzymes in the chloroplast?
    • A. 

      Grana

    • B. 

      Thylakoids

    • C. 

      Stroma

  • 11. 
    The grana are the double-membrane disks in the chloroplast
    • A. 

      True

    • B. 

      False

  • 12. 
    The thylakoid membrane contains green chlorophyll and other light capturing pigments.
    • A. 

      True

    • B. 

      False

  • 13. 
    About 40% of the radiant energy plants receive from the sun is in the form of UV light
    • A. 

      True

    • B. 

      False

  • 14. 
    Shorter wavelengths have higher energy and longer wavelenghts have less energy
    • A. 

      True

    • B. 

      False

  • 15. 
    What color has the shortest wavelengh; which one has the longest?
    • A. 

      Violet; red

    • B. 

      Red; violet

    • C. 

      Blue; green

  • 16. 
    In 1882, who demonstrated that oxygen production is diectly related to the type of light that the chlorophyll absorbs?
    • A. 

      Gregory V. Medel

    • B. 

      George Chikealo

    • C. 

      T.W. Engelmann

    • D. 

      Henry W. Goddard

  • 17. 
    What does each cholophyll molecule contain?
    • A. 

      A long lipid tail which is anchored into the interior of a thylacoid membrane

    • B. 

      A phosphate group

    • C. 

      One atom of magnesium

    • D. 

      A Hydroxyl group

  • 18. 
    Chlorophyll a reflects bluish green light
    • A. 

      True

    • B. 

      False

  • 19. 
    There is 3x more chlorophyll b than a in a chlorolplast.
    • A. 

      True

    • B. 

      False

  • 20. 
    What is the yellowish-orange pigment found in all plants?
    • A. 

      Chlorophyll a

    • B. 

      Chlorophlyll b

    • C. 

      Carotenoids

  • 21. 
    The maximum absorption of Carotenouds is in the blue and red wavelength
    • A. 

      True

    • B. 

      False

  • 22. 
    Light dependent photosynthesis is a (blank) pathway
    • A. 

      Cyclic

    • B. 

      Non-cyclic

  • 23. 
    For both photosystems involved in the non-cyclic pathway, their individual units are made up of:
    • A. 

      Mostly chlorophyll b

    • B. 

      Mostly chlorophyll a

    • C. 

      Much smaller amounts of chlorophyll b and carotenoid pigments

    • D. 

      Much larger amounts of chlorophyll b and carotenoid pigments

    • E. 

      A reaction-center molecule of chlorophyll a

  • 24. 
    The reaction-center molecule is the only molecule in the unit where an electron can be raised to an excited state.
    • A. 

      True

    • B. 

      False

  • 25. 
    The other pigments in the unit are called (blank) because they gather light energy and pass that energy on to the reaction-molecule.
    • A. 

      Reacrtion-center

    • B. 

      Antenna pigments

    • C. 

      UV pigments

Back to Top Back to top