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10 Cards in this Set

  • Front
  • Back
what occurs (over all) in carbon-fixation reactions?
-ATP and NADPH reduce carbon to a simple sugar
what molecule is present at the start and end of the calvin cycle?
ribulose 1,5-bispophate (RuBP)
-five carbon sugar
First stage of calvin cycle: fixation
3 CO2 fixes to 3 RuBP making 6 molecules PGA (three carbon atomss)
Second stage of calvin cycle: reducdion
-6 PGA reduces to 6 PGAL
Thrid stage of calvin cycle: regeneration of acceptor
-five of the six PGALs are ussed to make RuBP
What is the net gain from the calvin cycle?
one extra molecule of PGAL
what is PGAL?
glyceraldehyde 3-phosphate
Three carbon sugar
starting point of sugars
How many turns of the cycle it takes to make one net PGAL?
three turns
What gets consumed during three cycles?
3 CO2
9 ATP
6 NADPH
what is Rubisco?
the enzyme that catalys CO2 reaction with RuBP