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Light Dependent Stage
· Made up of cyclic and non-cyclic
phosphorylation.
· It takes place on the thylakoid membranes of the
chloroplasts.
· It has two main functions;
1. To produce ATP, which supplies energy for
synthesis of carbohydrates.
2. To split water molecules providing hydrogen
ions to reduce carbon dioxide and produce
carbohydrates.…read more

Slide 3

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Cyclic Phosphorylation
ATP
Electron
acceptor e-
Electron
ADP + Pi
transport
chain
Light hits
chlorophyll
and excites
an electron
Chlorophyll
-
e
light…read more

Slide 4

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Non-Cyclic Phosphorylation
Electron
Reduced
acceptor
NADP
NADP
ATP
Electron
acceptor To light
independent
H2O H+ +OH- ADP + Pi reactions
Electron
transport
O2 + H 2 O chain
e- e-
Photosystem I
-
e
Photosystem I
light
light…read more

Slide 5

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Light Independent Stage
· Also called the Calvin Cycle.
· Takes place in the stroma of the chloroplast.
· Reduction of carbon dioxide from the air to bring
about synthesis of carbohydrates.
· The glucose produces is used as fuels for
respiration in the plant. It goes to:
1. Double sugars such as sucrose for transport.
2. Polysaccharides such as starch for energy.
3. Cellulose for structural support.
4. Amino acids, nucleic acids, lipids.…read more

Slide 6

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Calvin Cycle
Glucose
Ribulose CO2
Biphosphate
(RuBP)
2XGlyceraldehyde 3
Phosphate (2 GALP) RUBISCO
NADP ADP + Pi
Reduced
NADP ATP
6C
2XGlycerate 3
Phosphate (2 GP)…read more

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