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Thread: The mystery of the disappearing hydrogens.

  1. #1 The mystery of the disappearing hydrogens. 
    Forum Freshman
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    Ok, you guys helped me a little with photosynthesis and now I can quote the entire process by heart and made a 98 on the test!

    So, I figured you would help me again.


    During cellular respiration in the very first step of glycolysis
    c6h12O8+C10H16N5O13P3+hexokinase---> C10H15N5O10P2 + C6H11O6P1+ hexokinase

    when Adenosine triphosphate and glucose are catalyzed by hexokinase, glucose is coverted into glucose 6, phosphate and loses a hydrogen atom.

    ATP (C10 "H16" N5O13P3) when coverted to ADP ( C10 "H15" N5O12P2) loses a hydrogen atom as well!

    My question as follows: Were did the hydrogen atoms run off to? it did not attach to NAD to be carried on to the ETS, and from all indications they simply went "poof".
    I asked a 12th grade pre-Ap chem teacher and my pre ap biology teacher and nether were able to give me an answer nor speculate what it might be.


    Thanks in advance!
    :-D


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  3. #2  
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    I'm no chemist but is it reasonable to assume part of this equation is H2 or H20 that you overlooked?


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  4. #3  
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    I had to refer to some old notes to get a reasonable retort lol

    but yes i believe that h20 was present in a formula for glycolysis
    but! I seriously doubt that it has anything to do with the hydrogen's because its so far off in the process chain


    if im correct h20 is given off when 2-phosphoglyceric acid
    ----P
    ( o-o-o--h20h2)
    gives up its
    h20 and is converted into phosphoenolpyruvic acid
    ---P
    (o-o-o--h2)

    I might be wrong, but that is the only place in glycolysis i can think of were h20 is involved
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  5. #4  
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    H2O will be used at any hydrolytic step, which is many of them in glycolysis. It will be generated at any condensation step.
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