# Calvin Cycle

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

1. ### joonkimdds Senior Member 7+ Year 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 Member 5+ Year 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

### joonkimdds Senior Member 7+ Year 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

if it's really 20PGAL that means we shouldn't consider PGAL that recycles?

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4. ### djeffreyt Senior Member 7+ Year 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. ### jkh1886

Joon, come back to this question in 2 years. until then...enjoy your youth and chase some tail!

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