1. AP and Pre-AP Biology Serrano High School
Photosynthesis
AP and Pre-AP Biology
Serrano High School

2. The Equation 6CO2 + 6H2O + light  C6H12O6 + 6O2 Chlorophyll required
Water both consumed & produced

3. Chloroplasts Site of photosynthesis Structure Double membrane
Thylakoids
Granum
(Stack of thylakoids)
Stroma

4. Chloroplasts Relating structure to function Thylakoid space
Allows for accumulation of H+
Segregates H+ from rest of organelle

5. Chloroplasts Relating structure to function Thylakoid membrane
Contains photosystems & ETC

6. Chloroplasts Relating structure to function Large number of thylakoids
Large surface area
Large number of ETC and photosystems

7. Chloroplasts Relating structure to function Inner membrane
Segregates chemical of Calvin-Benson cycle from cytosol

8. Photosynthesis

9. Light Reactions

10. Light Reactions
Photosystem II captures light energy
P680

11. Light Reactions
Light energy passed to reaction center
P680

12. Light Reactions
2 e- boosted to higher energy state
P680

13. Light Reactions 2 e- passed through ETC to Photosystem I
H+ gradient created; ATP produced
ATP
P700
P680

14. Light Reactions Photosystem I captures light energy
Passes it to reaction center
ATP
P700
P680

15. Light Reactions e- from P700 boosted to higher energy state P700 P680
ATP
P700
P680

16. Light Reactions e- move through ETC e- accepted by NADP+ NADP+ P700
ATP
NADP+
P700
P680

17. Light Reactions
2e H+ + NADP+  NADPH
ATP
NADP+
NADPH
P700
P680

18. Light Reactions Water split e- from water replace lost e- from P680
O2 leaves
ATP
NADPH
H2O O2
P700 H+
P680

19. Calvin Cycle

20. Calvin Cycle Rubisco fixes 6CO2 to 6RuBP (5-C)
RuBP = ribulose biphosphate
3PG (3-C) produced
3PG =
3-phosphoglycerate

21. Calvin Cycle 3PG converted to 12 G3P G3P = glyceraldehyde 3-phosphate
12 ATP used
12 NADPH used

22. Calvin Cycle 2 G3P exit cycle & used to make glucose
Glucose used to make sugars & other carbohydrates

23. Calvin Cycle
10 G3P (3-C) used to make RuBP (5-C)
6 ATP used