1. Ch. 8 Photosynthesis

2. ENERGY & LIFE
Autotrophs get energy they need to produce food from the sun (or a light source)
ATP stores energy for cell activities like active transport & movement within the cell

3. PLANT EXPLORATION… Van Helmont: Plants need water to grow Priestley:
Plants produce oxygen (O2)
Ingenhousz:
Plants need light to produce oxygen (O2)

5. Plants are green because of the pigment ______________
Plants are green because of the pigment ______________. (which absorbs light energy)
CHLOROPHYLL
During the fall, the green chlorophyll pigments are greatly reduced revealing the other pigments.
Carotenoids are pigments that are either red or yellow.

6. Light vs. Pigments

7. Chloroplast Structures & Function:
Locate the …
Thylakoids
Granum
Stoma
2 stages of photosynthesis:
Light-dependent reactions
Calvin Cycle (Light-independent)

8. Light Dependent Reactions (Photosystems II and I)
Light absorbed by chlorophyll
(in Thylakoids)
ADP converted to ATP
Convert NADP+ to NADPH
(Electron Carriers)
Produce Oxygen (O2) gas

9. Calvin Cycle or Light independent reactions (Dark Reactions)
CO2 enters from atmosphere
Energy from ATP & NADPH used to convert 3-carbon molecule to higher energy
Produces a single 6-carbon sugar molecule

10. Basic Process of Photosynthesis:
CO2
Sun
LIGHT
Light Dependent Reactions
Calvin Cycle
CHRLORPLAST O2
Sugars

11. Factors that affect the rate of Photosynthesis are…
Availability of Water
Temperature
Intensity of Light
Concentration of CO2