1. Photosynthesis
Learning Goal 5-6

2. Chloroplast The organelle that does PHOTOSYNTHESIS Parts:
Turns sunlight into food energy (sugar)
Parts:
Thylakoid
Green coins
Granum
Stack of thylakoids
Stroma
Outer jelly substance

3. Review Which organelle does photosynthesis?
What are three parts of a chloroplast?

4. Photosynthesis Equation
Light Energy
Chloroplast
CO2 + H2O
Sugars + O2

5. Photosynthesis Equation
Reactants: what the plant needs
Water (H2O)
Carbon Dioxide (CO2)
Sunlight
Products: what the plant makes
Oxygen (O2)
Sugar = Glucose (C6H12O6)
6CO2 + 6H2O + Sunlight  6O2 + C6H12O6

6. Review What are the reactants in photosynthesis?
What are the products?

7. Stages of Photosynthesis
Light Dependent Reactions
In the Thylakoids
Pigment = Chlorophyll
Light Energy charges batteries (ATP, NADPH)
Calvin Cycle (Light Independent Reactions)
In the Stroma
Batteries (ATP, NADPH) make food (Sugar/Glucose)

8. Review
What part of the chloroplast does the light dependent reactions?
What part does the Calvin Cycle?

9. Photosynthesis Chloroplast H2O Sugars CO2 Light O2 NADP+ ADP + P
Dependent
Reactions
Calvin
Cycle
ATP
NADPH
Chloroplast O2

10. Factors Affecting Photosynthesis
Temperature
The more reactants the faster it goes
Eventually photosynthesis reaches a maximum speed
If you are missing ANY reactant (ingredient), photosynthesis will stop

11. Review What temperatures might slow down photosynthesis?
If a plant has an unlimited amount of reactants, will photosynthesis speed up forever?
What can stop photosynthesis?

12. Microscopes
Look at an Elodea plant in the microscope and draw what you see below (the green dots in each cell are chloroplasts):