1. Photosynthesis Review

2. The Cyclical Pathway of Photosynthesis
Uses p700 to excite pigment electrons
Excited electrons are passed down an electron transport chain via redox reactions
A proton gradient is generated
ATP synthase is used to produce ATP

3. The Non Cyclical Pathway of Photosynthesis
Electrons are drawn from water and excited through photolysis at p680
Electrons are used to create a proton gradient for ATP synthase
Electrons are reenergized at p700 and added to NADP+ to produce NADPH
The end products ATP and NADPH can now be used to create G3P and glucose in the Calvin Cycle

4. - This diagram shows the location of the light dependent reactions
All components of the light reactions are found embedded in the thylakoid membrane of the chloroplast
The proton gradient is build inside the thylakoid lumen
The end products ATP and NADPH are released into the stroma
The Calvin Cycle takes place in the stroma

5. Each turn of the Calvin cycle fixes one molecule of CO2
Every three turns produces one molecule of G3P
It takes 2 G3P to make one glucose (i.e. 6 turns of the Calvin cycle)
In this process, the energy stored from the light reactions in the form of ATP and NADPH is used to produce glucose

6. CO2 is fixed ultimately into glucose (C6H12O6)
H2O is being split to produce O2 as an electron donor