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Photosynthesis
Calvin Cycle (C3 Pathway)
6ATP + 6NADPH + 3 RuBP + 3 CO2 6 G3P
1 G3PReady for cell use
5 G3P3 ATP +
Calvin Cycle
6 NADPH
3 ATP
6 – G3P
3C5 – G3P
6 ATP5C
3 – RuBP(Ribulose
Bisphophate)
1C3 – CO2
3C6 - PGA
Calvin Cycle
1 – G3P5C
3 – RuBP
C3 Pathway
Rubisco
6 NADPH
3 ATP
6 – G3P
3C5 – G3P
6 ATP
5C3 – RuBP
1C3 – CO2
3C6 - PGA
Calvin Cycle
2 – G3P5C
3 – RuBP
C3 Pathway
Rubisco
3C1 – G3P
Photorespiration In arid conditions…
stomata close O2 builds up CO2 is depleted
Rubisco links RuBP to O2
No carbon fixation No sugars
ATP
O2
CalvinCycle
Vascular Tissue
C4 Pathway – PR Solution 1
CO2 fixing enzyme has minimal O2 affinity
4-C molecule forms(C4 Pathway)
Spatial separation of Calvin cycle (rubisco) and O2
CO2
3C
CO2
3C
Sugar
4C
MesophyllCell
BundleSheath
Cell
Rubisco works here
Temporal separation of carbon fixation & Calvin cycle Stomata open at night to collect CO2 (minimal evap.) Fixed CO2 kept until ATP & NADPH available during day
CAM Pathway – PR Solution 2
Photosynthesis ReviewLight Rxns C Fixation Calvin Cycle
C3 Plants
C4 Plants
CAM Plants
Mesophyll Mesophyll Mesophyll
Mesophyll MesophyllBundleSheath
Cell
Mesophyll Mesophyll Mesophyll
Photosynthesis Review
What is the disadvantage of open stomata?
Photosynthesis Review
What color of visible light carries the most energy?
Photosynthesis ReviewPut the following in the order
an e- may pass through:
Photosystem I, G3P, ETC, NADPH, photosystem II, water
Photosynthesis Review
Location in the cell of the Calvin Cycle
of C3 plants
Photosynthesis ReviewTWO things that can
happen to the primary product of ps?
Photosynthesis Review
Location of Calvin Cycle in C4
plants
Photosynthesis Review
Put the following in order of size:
RuBP, G3P, Starch, Glucose, Sucrose
Photosynthesis ReviewEnglemann’s experiment determined the effect of _______ on the rate of
photosynthesis.