1. Photosynthesis
The Light & Dark Reactions
Carbon Cycle

2. Photosynthesis Complex process that actually occurs in 2 stages
Carbon Cycle

3. Light Reactions of Photosynthesis
Requires light
H2O required
Occurs in the grana
Converts ADP molecules into ATP

4. Light Reactions of Photosynthesis
Water (H2O) molecules are split
Result H2 + O 2

5. Light Reactions of Photosynthesis
O2 is released into the atmosphere
H will bond to NADP to form NADPH

6. Photosynthesis Diagram
LIGHT REACTION
(GRANA)
1. LIGHT
2. H2O
5. ATP
6. NADPH
3. Grana
4. O2

7. Dark Reaction of Photosynthesis
ATP & NADPH from light reaction are used in the dark reaction
Dark reactions do not require light
Occurs in the stroma
Requires carbon dioxide

8. Dark Reaction of Photosynthesis
Calvin cycle (Carbon Cycle) synthesizes glucose

9. Dark Reaction of Photosynthesis
ATP from the light reactions drives the Calvin cycle
ATP  energy + ADP + P
NADPH releases H  NADP
H used to form glucose

10. Dark Reaction of Photosynthesis
ADP & NADP returned to grana for light reaction

11. Photosynthesis Diagram
LIGHT REACTION
(GRANA)
DARK REACTION
(STROMA)
1. LIGHT
2. H2O
9. CO2
5. ATP
6. NADPH
10. Carbon Cycle
7. ADP
3. Grana
8. NADP
4. O2
11. C6H12O6

12. Images- Clip Art