Photosynthesis: Calvin Cycle Flashcards
(17 cards)
Calvin Cycle was discovered by which people in 1950
Melvin Calvin, James Bessham, and Andrew Benson
The “synthesis” part of the photosynthetic process.
Fixes CO2 gas and incorporating its carbon to organic molecules to
produce sugars.
Calvin Cycle
3 major phases of the Calvin Cycle
Carbon Fixation
Reduction of 3-PGA
Regeneration of RuBP
Carbon dioxide enters
the leaf through
structures called
stomata.
Carbon (CO2) Fixation
Oxygen gas also leaves the leaf through the?
stomata
is a
five-carbon (5C) sugar which
“receives/accepts” the carbon from
carbon dioxide.
RuBP/ribulose bisphosphate
The carbon from carbon dioxide (CO2) is
integrated to RuBP by the enzyme –
RuBisCO (ribulose bisphosphate carboxylase/oxidase)
RuBisCO results in to these short-live 6-carbon intermediate that dissociates into ________________________________
Two 3-carbon molecule (3-phosphoglycerate) (3-PGA)
Each of the 3-PGA molecule receives another phosphate group from
ATP*, becoming _____________________________
1,3-bisphosphateglycerate
Electrons from NADPH* reduces 1,3-biphosphoglycerate, which also
loses a phosphate group, becoming ______________________________
G3P/GAP (glyceraldehyde 3-phosphate)
G3P is a triose phosphate, which will now serve as the precursor for
the formation of
glucose
After 3 carbon dioxide molecules fixed, who many molecules of G3P will be produced.
Six (6)
How many of the 6 G3P molecules will leave the cycle and becomes the
precursor for glucose.
One (1)
The other five (5) molecules of G3P will then proceed to the next phase,
the regeneration of RuBP
The 5 molecules of G3P has a total of ____________
15 carbons since each G3P has 3 carbons
The complex series of reaction in the regeneration of RuBP uses ____________
3 ATP molecules
to produce glucose, we
spend…
6 CO2, 18 ATP, 12 NADPH
