1. Chapter 10
Photosynthesis

2. The Process That Feeds the Biosphere

3. 10.1 Photosynthesis converts light energy to the chemical energy of food

4. Site of Photosynthesis

5. The Equation

6. Where does the oxygen come from?

7. Photosynthesis as a Redox Process
Photosynthesis reverses the electron flow as compared to cellular respiration.
The electrons increase in potential energy as they move from water to sugar.
The energy for this is provided by light.

8. The Two Stages of Photosynthesis

9. The Nature of Sunlight

10. Photosynthetic Pigments

11. Spectrophotometer

12. Absorption vs Action Spectrum

13. Engelmann’s Experiment

14. Excitation of isolated chlorophyll molecules

15. How a photosystem harvests light

16. Linear electron flow

17. Cyclic Electron Flow

18. Light reactions

19. Calvin Cycle

20. Alternative mechanisms of carbon fixation
C3 plants and photorespiration
Consumes oxygen and releases carbon dioxide
Uses ATP but does not generate sugars
Occurs when stomata are partially closed on hot, dry days
Rubisco has a greater affinity for oxygen than carbon dioxide

21. Photorespiration

22. C4 plants
Preface Calvin Cycle with carbon fixation that forms a 4-carbon compound as its first product
Ex) sugarcane, corn, and members of the grass family

23. C4 pathway

24. CAM Plants Cacti, pineapples
Open stomata at night and close them during the day

25. CAM Pathway