1. Photosynthesis

2. Chloroplast Structure

3. Photosynthetic Reactions
Light dependent reactions
Light independent reactions (Calvin Cycle)

4. Light Reactions
Light dependent reactions take place in the thylakoid membrane, with the pigment chlorophyll absorbing sunlight

5. Light Reactions
1. Energy from sunlight breaks water into H+, oxygen (O2) and electrons (e-).

6. Light Reactions
2. H+ and e- are used to produce energy carrying molecules NADPH and ATP

7. Light Independent Reactions
Light independent reactions occur in the stroma

8. The Calvin (C3) Cycle

9. CO2 enters the leaf through the stomates
The Calvin (C3) Cycle

10. ATP and NADPH (from the light reactions) power the creation of three carbon chains
The Calvin (C3) Cycle

11. The Calvin (C3) Cycle ADP and NADP+ return to the light reactions
in the thylakoid to be “recharged”
The Calvin (C3) Cycle

12. Formation of Glucose C-C-C + C-C-C  C-C-C-C-C-C Glucose C6H12O6
3-carbon chains from the C3 cycle join to form the six carbon molecule, glucose (or other molecules required by the plant)
C-C-C + C-C-C  C-C-C-C-C-C
Glucose
C6H12O6

13. Net Equation for Photosynthesis
6 CO2 + 6 H2O      C6H12O6 + 6 O2
light, enzymes