concept 10.4: the calvin cycle uses the chemical energy of ATP and NADPH to reduce CO2 to sugar

what does the calvin cycle do

regenerates its starting material after molecules enter and leave the cycle

what is the calvin cycle most like

the citric acid cycle

is the calvin cycle anabolic or catabolic

anabolic

what is the calvin cycle doing

building sugar from smaller molecules by using ATP and the reducing power of electrons carried by NADPH

what goes in and out of the calvin cycle

carbon enters the cycle as CO2 and G3P (a sugar, glyceraldehyde 3- phosphate)

what must occur to produce one molecule of G3P

the cycle must occur 3 times, fixing three molecules of CO2 for each turn of the cycle

what are the three phases of the the calvin cycle

carbon fixation, reduction, regeneration of the CO2 acceptor

what occurs during carbon fixation

the binding of CO2 to a 5-carbon sugar called ribulose biphosphate (RuBP) is catalyzed by rubisco and the 60carbon intermediate molecule is immediately split into two molecules of 3- phosphoglycerate for each CO2 fixed

what occurs during reduction

each molecule of 3-phosphoglycerate is altered through phosphorylation by 6 ATP and reduction by 6 NADPH to produce a G3P sugar

what occurs during the regeneration of the CO2 acceptor

the remaining 5 molecules of G3P are rearranged in a complex series of reaction yielding three molecules of RuBP and three additional molecules of ATP are used to facilitate the regeneration of RuBP