2. Photosynthesis Conversion of light E to chemical E (food) Conversion of light E to chemical E (food) 6 H 2 O + Light + 6 CO 2  C 6 H 12 O 6 + 6 O 2 Light Reactions Light Reactions H 2 O + Light E  Unstable Chem E (ATP + NADPH) Dark Reactions Dark Reactions CO 2 + Unstable Chem E (ATP + NADPH)  Stable Chem E (sugars) From Air From Soil Food Waste

3. Chloroplast Structure

4. Light Reactions ETC Stroma Thylakoid Space Chlorophyll absorbs light to energize electrons Chlorophyll absorbs light to energize electrons Electrons run through an ETC Electrons run through an ETC The released E builds proton gradient The released E builds proton gradient

5. Chlorophyll splits H 2 O’s to replace lost e - Chlorophyll splits H 2 O’s to replace lost e - O 2 is released O 2 is released Light Reactions Stroma Thylakoid Space ETC

6. Light Reactions Stroma Thylakoid Space ATP Synthase ETC

7. PrimaryProducts of Light Rxns NADP picks up e - and H + NADP picks up e - and H + Light Reactions Stroma Thylakoid Space ETC

8. Dark Reactions (Reactants) From air From Light Reactions

9. Bonus! All organic molecules Dark Reactions (Products) From Light Reactions Back to Light Reactions

10. Photosynthesis Review 6 H 2 O + 6 CO 2 + Light  C 6 H 12 O 6 + 6 O 2 1)For each molecule above, is it used or produced? In the light or dark rxns? 2)What is (are) the primary products of the light reactions? What do they provide to the dark reactions? 3)What other purpose might the final carbohydrate produced in photosynthesis serve aside from acting as a food source?