1. Academic Biology Notes
Photosynthesis
Academic Biology Notes

2. Photosynthesis

3. Overview of Photosynthesis

4. Light Dependent Reactions
Electron transport chain
Chlorophyll
Chlorophyll
PS I
PS II

6. Light Dependent Steps
Light Hits Photosystem II and excites an electron .
The electron came from the splitting of water…oxygen is released.
The excited electron jumps to a higher energy level and produces ATP.
The electron falls into Photosystem I, gets excited again, jumps to a higher energy level and produces NADPH

7. Calvin Cycle
RuBP
PGA
PGAL

8. Calvin Cycle
Carbon from the atmosphere enters and joins with RuBP ( a 5 carbon compound)
This creates an unstable 6 carbon molecule that immediately splits into 2 – 3 carbon molecules called PGA.
ATP donates phosphate and energy
NADPH donates H+ and e-
This turns PGA into PGAL
2 PGAL’s join to form Glucose
Other PGAL’s regenerate (with the help of ATP) more RUBP