INSIDE THE LEAF OF THE PLANT… INSIDE THE CELLS OF THE LEAF… INSIDE THE CHLOROPLASTS OF THE CELLS… 6CO 2 + 6H 2 O (+ light energy) → C 6 H 12 O 6 + 6O 2

Photosynthesis Cellular Respiration CO 2, H 2 O O 2, glucose ATP Sunlight In the CHLOROPLAST… In the MITOCHONDRION…

Sunlight is radiation, or electromagnetic energy  Radiation travels as waves  Visible light is only a small part of the electromagnetic spectrum

◦ Pigments  built in thylakoids  Absorb some wavelengths of light; reflect or transmit others

◦ Chlorophyll a  Absorbs blue-violet and red light, reflects green light  Raises the level of energy in electrons. ◦ Chlorophyll b  Absorbs blue and orange light, reflects yellow-green  Conveys absorbed energy to chlorophyll a

Light Reflected light Absorbed light Chloroplast Transmitted light

 Chlorophyll, (inside of thylakoids) captures light energy  (CO 2 ) enters the plant through stomata (small pores) in the leaf  (H 2 O) enters the plant through its roots 6CO 2 + 6H 2 O (+ light energy)

 Oxygen gas ◦ Used by plants and animals during cellular respiration  Glucose ◦ Used for energy C 6 H 12 O 6 + 6O 2

Photosynthesis takes place in 2 stages 1.Light-Dependent - Thylakoids Convert light energy to chemical energy and produce oxygen gas. 2.Light Independent (Calvin Cycle) - Stroma ATP and NADPH power the synthesis of sugar from carbon dioxide and water.

 Light collecting units of the chloroplasts  Clusters of pigments and chlorophyll found in thylakoid membranes  There are 2 photosystems: ◦ Photosystem I ◦ Photosystem II

PhotosynthesisCellular Respiration FunctionCapture EnergyRelease Energy LocationChloroplastsMitochondria ReactantsCarbon Dioxide Water Glucose Oxygen ProductsGlucose Oxygen Carbon Dioxide Water