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Cellular respiration????

Discussion in 'DAT Discussions' started by waitingame, Jun 3, 2008.

  1. waitingame

    waitingame 2+ Year Member

    May 16, 2008
    I cant find where pyruvate decarboxilation takes places.... mitochondria matrix???

    Also wanted to make sure Citric acid cycle... Mitochondria matrix and the ETC is the inner mitochondria matrix correct. Thanks
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  3. osimsDDS

    osimsDDS 5+ Year Member

    Jun 8, 2007
    pyruvate decarboxylase takes place in the mitochondria in the matrix, glycolysis takes place in the cytoplasm and moves the pyruvate + the NADH to the matrix of mitochondria.
    TCA cycle also matrix and ETC happens in the inner mitochondrial MEMBRANE...also the gradient of protons it forms is higher between the inner membrane and outer membrane of the mitochondria to couple ATPase inside the cell (High to Low). hope that makes sense
  4. waitingame

    waitingame 2+ Year Member

    May 16, 2008
    Yep thanks
  5. userah

    userah 7+ Year Member

    Aug 9, 2007
    yea i believe it's in the matrix. because products of glycolysis are 2 pyruvates and they are transported to the matrix. I believe that's where they lose CO2 and join with acetyl groups to become acetyl coA's.

    as for the other two things, yea citric acid cycle is matrix and ETC is inner mitochondrial membrane
  6. Dencology

    Dencology 2+ Year Member

    Mar 7, 2008
    so electrons in glycolysis are pumped from inner mitochondria membrane to matrix?

    DRHOYA 2+ Year Member

    May 15, 2008
    The 2 pyruvate products of glycolysis (which takes place in the cell cytoplasm) are transported accross the mitochondrial membranes into the matrix where the Kreb's Cycle takes place. The electrons produced are thus sent through the ETC has its molecules located on the INNER MEMBRANE. A proton gradient forms in the inner-membrane-space, and the last molecule in the ETC is an ATPase which uses the electrons to form ATP.

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