BIO SET 2 (2)

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BIO SET 2 (2)
2011-03-02 16:49:49
Bio set

bio set 2
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  1. Can you pass electrons to a lower reduction potential?
  2. You can only pass electrons to something with a ________ reduction potential.
  3. Brief description of the "Z-scheme"
    Things with a high reduction potential needs to be lowered to a lower reduction potential so that it can give electons to things with a higher reduction potential.
  4. P680 is part of...
  5. P700 is part of ...
  6. PSI is a ________
  7. P700 is a part of....
    The PSI complex
  8. In a redox couple, electrons can only be passed to a compund with....
    a higher (more positive) reduction potential (Eo value)
  9. Ground State P680 =
    in the dark
  10. Ground State P680 can be excited by...
  11. What provides the energy to split water and lower the Eo Value of P680 to an excited state?
  12. The excited states have a ______ reduction potential than the ground states
  13. The point of the z-scheme?
    Make NADPH and set up electron transport
  14. Summary of Light reactions?
    • PSII (P680) usues light energy to split water by photolysis
    • Hydrogen ions contribute to the proton gradient in the lumen
    • The electrons are passed fo the electron transport chain and povide energy for more proton pumping
    • Electrons passed to PQ and protons go from the stroma to the lumen to increase proton concentration in lumen
    • Cytb6/f complex accepts electrons and pumps some more protons into the lumen
    • Electrons are passed to PC and PSI (P700)
    • Electrons passed to NADP+ to make NADPH
    • The energy og the proton gradient is used to make ATP in the stroma
  15. Photolysis produces protons in the...
  16. Photolysis _______ the pH of the lumen
  17. What are two way to increase the proton concentration in the lumen?
    • Photolysis in the lumen
    • Pumping protons from the stroma to the lumen
  18. In chloroplasts, ATP is made in ...
    the stroma
  19. why do plants need water?
    Water is the intial electron donor. No donor, to electron transport, no energy being made
  20. why do plants need light?
    For photolysis, and to lower the reduction potentials of P680 and P700
  21. Why do plants need CO2?
    For dark reactions
  22. What do you get out of mitochondrial electron transport?
    A proton gradient
  23. What do you get out of chloroplastic electron transport?
    • A proton gradient
    • NADPH
  24. Why does photophosphorylation produce NADPH and ATP?
    To give to the dark reactions to help make a carbohydrate
  25. For light reaction of photosynthesis the intial electron donor is
  26. For light reaction of photosynthesis the final electron acceptor is...