Bio1332 Biochemistry - Lecture Twenty - Photosynthesis

9 Questions | Total Attempts: 80

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Bio1332 Biochemistry - Lecture Twenty - Photosynthesis - Quiz

By the end of the lecture you will; understand the light dependent and light independent reactions of photosynthesis. understand how light absorption by chlorophyll induces electron transfer. understand how two photosystems (PS I and PS II) generate a proton gradient and NADPH. understand how the proton gradient across the thylakoid membrane drives ATP synthesis. understand how the NADPH and ATP produced by the light reactions is used to fix CO2


Questions and Answers
  • 1. 
    Name the organelle where photosynthesis takes place.
  • 2. 
    Name the two most common carbohydrates produced during photosynthesis. Separate your two answers with a comma and a space.
  • 3. 
    Please fill answer below: The energy of light captured by pigment molecules, called _________, in chloroplasts is used to excite electrons giving them great reducing potential
  • 4. 
    If a suitable electron acceptor is nearby, the excited electron can move from the initial molecule to the acceptor molecule. This results in the formation of...
    • A. 

      A positively charged initial molecule and a negatively charged acceptor molecule

    • B. 

      A neutrally charged initial molecule and a negatively charged acceptor molecule

    • C. 

      A negatively charged initial molecule and a positively charged acceptor molecule

    • D. 

      A positively charged initial molecule and a neutrally charged acceptor molecule

  • 5. 
    The site where the photo-induced charge separation occurs is called the special pair of chlorophylls in the ______________.
  • 6. 
    Which of the following is true?
    • A. 

      Electrons flow first through Photo System II, then cytochrome bf, then through Photo System I

    • B. 

      Electrons flow first through Photo System I, then cytochrome bf, then through Photo System II

    • C. 

      Electrons flow first through cytochrome bf, then Photo System II, then through Photo System I

    • D. 

      Electrons flow first through cytochrome bf, then Photo System I, then through Photo System II

  • 7. 
    Which of the following is true?The Calvin cycle requires __________ per CO2 fixed.
    • A. 

      2 NADPH and 3 ATP

    • B. 

      3 NADPH and 2ATP

    • C. 

      2 NADPH and 2 ATP

    • D. 

      3 NADPH and 3 ATP

  • 8. 
    Please fill answer below: 
    • CO2 is fixed by the enzyme _______, which reacts CO2 with ribulose bisphosphate to produce two molecules of 3-phosphoglycerate
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