A  Brief Review of Photosynthesis
Location

 

Reaction Starting Materials Reaction Energy source Key Reaction Molecules Reaction Center Chemical Reaction
(location)
Reaction Output

Light - Dependent Reactions
When Light  Is Available
 
 
 
 
 
 
 
 
 
 
 
 
 
 
All Cells with Choloroplast
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Water
(H2O)
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Solar Visible 
 
 

Light
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Chlorophyll  a
Supported by Chlorophyll  b
and Carotenoid
 
 
 
 
 
 
 
 
 
 
 
 

 

Photosystem I
P700
 

Photosystem II
P680
 
 
 
 
 
 
 
 
 
 
 
 

 

H2O Oxidation to Oxygen
(Thylakoid space)

Electrons from H2O
are Transported from P680 to P700 to NADPH
Noncyclic
and Cyclic Electron Flow
During the Light Reaction.
(Thylakoid membrane)
 
 
 

 

Oxygen

ATP
and
NADPH

Light - Independent 
Reaction
Occurs under both light and dark conditions.
 

 
 
 

Cells with Chloroplast
Stroma region
 

 


 
 
 

Carbon Dioxide
(CO2)
 

 


 

ATP

NADPH
From Light Reaction
 
 
 

 

Rubisco Enzyme + other enzymes
(C3 plant)

PEP carboxylase +
Rubisco + other enzymes
(C4 plant)


 

Stroma region of the mesophyll cell.
Photorespiration in C3 plants.
(sugar production decreases)
Calvin cycle occurs in the bundle sheath cell in C4 plants
C4 pathway
CAM pathway in CAM Plant.
 


 
 
 

Glucose

 

        *:  ETC:  Electron Transport Chain