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Calvin Cycle

Discussion in 'DAT Discussions' started by joonkimdds, Aug 9, 2006.

  1. joonkimdds

    joonkimdds Senior Member
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    why does it take 6 turns of the calvin cycle to make 1 glucose?

    1glucose = 6Carbon => 2PGAL is made in 1 cycle
    PGAL = 3C
    glucose = 6C
    1 cycle makes 2 PGAL = 6C = glucose

    so shouldn't it only take 1 turn of the calvin cycle to make 1 glucose?
    where am i going wrong :(
     
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  2. ConfusedOne

    ConfusedOne Member
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    6 turns makes 12 PGAL. 10 of those goes back to regenerate RuBP. Other 2 into glucose. :)
     
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  3. OP
    OP
    joonkimdds

    joonkimdds Senior Member
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    but one of the kaplan blue book problem says
    10 turns of the calvin cycle will produce:
    A: 10 CO2
    B: 20 PGAL
    C: 20 RBP
    D: 36 ATP
    E: 5 glucose

    and the answer is B)20PGAL
    if it's really 20PGAL that means we shouldn't consider PGAL that recycles?
     
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  4. djeffreyt

    djeffreyt Senior Member
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    thinking too much again.

    just because something is recycled doesn't mean it was never produced...the question asks how many are produced...doesn't ask for a net amount.
     
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  5. Joon, come back to this question in 2 years. until then...enjoy your youth and chase some tail!
     

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