Photosynthesis

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Photosynthesis The process plants use to trap the sun’s energy and build carbohydrates (glucose) 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2 6 carbon dioxides + 6 waters  glucose + 6 oxygens

Where does photosynthesis occur? Remember the Elodea lab? In Chloroplasts

Why are plants green? –Chlorophyll pigments in the thylakoid cannot absorb green light –All nongreen colors are absorbed and green is reflected

Two Types of Photosynthesis Reactions: 1. light dependent reactions 2. light independent reactions

Light Dependent Reaction Requires sunlight Traps sun’s energy and converts to electrons –Splits water to oxygen and hydrogen –Makes ADP to ATP

Light Dependent Reaction cont’d See fig.9.6b (pg.233) “Electron Transport Chain”

Shall we take a break here? YES NO

Light Independent Reaction Does not require light Uses carbon dioxide to make glucose

Photosynthesis Light Dependent Light Independent

Assignment Read pg Make a picture flow chart on Photosynthesis (3 per group) –Must include sun, CO 2, H 2 O, glucose, O 2, chloroplast, thylakoid, chlorophyll, electron transport chain, ADP, ATP, NADP +, NADPH, light dependent/independent reaction Answer study guide questions #’s 4-20