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Electron transport chain in the thylakoids: Lumen getting more or less acidic?

Discussion in 'DAT Discussions' started by 510586, Aug 21, 2015.

  1. 510586

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    Hey guys I have a question. So I understand that during the electron transport chain, H+ are brought into the lumen from cytochrome and photolysis (more H+ in there so should be more acidic). However, ATP synthase is also pumping H+ out of the lumen into the stroma. If they ask what is getting acidic during the electron transport chain, how would we interpret this?
     
  2. cacajuate

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    Getting more acidic.
     
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  3. 510586

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    Oh ok and the stroma getting more acidic as well too then. THanks
     
  4. dannybobanny182

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    Thanks for bringing this up! I was confused for a bit. Maybe this animation will help.

     
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  5. enamel88

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    More acidic in the lumen Bc it accumulates more than it can pump out. Just a side note remember that it pumps out 3H/Atp
     
  6. orgoman22

    orgoman22 DAT DESTROYER
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    Wherever the H+ ions are pumped will be the area with the lowest pH and most acidic.

    Hope this helps

    Dr. Romano
     
  7. 510586

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    So in this case it would be the stroma?
     
  8. orgoman22

    orgoman22 DAT DESTROYER
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    The concentration of protons can be nearly 1000 x higher inside the thylakoids than in the stroma during light reactions. There are many articles on this that you can google if you want more info.

    Dr. Romano
     
  9. 510586

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    Oh ok I thought you said wherever H+ is pumped to is most acidic. So it's actually where they are pumped FROM which is lumen that gets more acidic during ETC.
     

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