1. Photosynthesis

2. Photosynthesis
Uses the energy of sunlight to convert water and carbon dioxide (reactants) into high-energy sugars and oxygen (products).

3. Photosynthesis
The overall reaction is: carbon dioxide (6CO2) + water (6H2O) + light  glucose (C6H12O6) + oxygen (6O2)

4. Photosynthesis Involves 2 sets of reactions Light-dependent reactions
Require light, light-absorbing pigments and water as a source of electrons and hydrogen ions (H+).
Produce ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
Occur within the thylakoid membranes of chloroplast.
Release oxygen as a waste product.

5. Photosynthesis

6. Photosynthesis Light-independent reactions
Require carbon dioxide from the atmosphere.
Use the ATP and NADPH of light-dependent reactions to produce carbohydrates.
Take place in the stroma of chloroplast.
Work together to produce energy-rich compounds from sunlight.

7. Chloroplasts and Chlorophyll
Are organelles that carry out photosynthesis

8. Chloroplasts and Chlorophyll
Contain thylakoids and stroma.
Thylakoids are
Saclike photosynthetic membranes that are stacked into grana.
Contain the green pigment chlorophyll.
Stroma are outside the folded portion of chloroplasts.

9. Chloroplasts and Chlorophyll
Is a light-absorbing pigment that captures energy from sunlight.
Is the main pigment of plants.
Contains electrons that directly absorb light energy
Light energy raises the energy level of these electrons and produces high-energy electrons that make photosynthesis work.

10. High Energy Electrons
Are the hot potatoes of photosynthesis because they are highly reactive.
Are carried
To other molecules by electron carriers
Carriers accept and transfer the energy of these electrons to other molecules.

11. High Energy Electrons Are carried by NADP+
NADP+ accepts and holds 2 high-energy electrons along with a hydrogen ion (H+).
This converts NADP+ to NADPH.
NADPH releases the energy of the electrons to chemical reactions in the cells.