Photosynthesis Please copy this in your Notebook The

Photosynthesis Please copy this in your Notebook. The last 2 slides should be on the left side of your notebook

Photosynthesis When I plant a seed that weighs 1 gram, how does it grow into a huge sequioa tree which weighs tons? Where does the extra weight come from? The soil? The water? Dutch Physician Jan Van Helmont n n Soil weighed constantly 75 grams Water was the only thing he added Joseph Priestley n n Observed a plant keep a flame alive underneath a glass dome Jan Ingenhousz figured out that plants produce oxygen in light Photosynthesis n Plants convert the energy of sunlight into the energy in the chemical bonds of carbohydrates

Requirements for Photosynthesis Sunlight – different wavelengths of visible light are needed for photosynthesis Carbon dioxide Water Pigments – absorb the specific wavelengths (colors) from light n Chlorophyll is the primary pigment in plants. Energy storing compounds n ATP (adenosine triphosphate) – power currency of the cell

“Simplified” EQUATION FOR PHOTOSYNTHESIS 6 CO 2 + 6 H 2 O + CARBON DIOXIDE WATER Energy (Light) C 6 H 12 O 6 + 6 O 2 GLUCOSE OXYGEN

Photosynthesis: Reactants and Products Light Energy Chloroplast CO 2 + H 2 O Go to Section: Sugars + O 2

Photosynthesis Overview Light H 2 O CO 2 Chloroplast NADP+ ADP + P Chloroplast Light. Dependent Reactions O 2 Calvin Cycle ATP NADPH Sugars

Fill in the Boxes below. Light Reactions (Light dependent) Dark Reactions (Light independent) What you need light, ADP, NADP+, H 2 O ATP, NADPH, CO 2 What you get ATP, NADPH, O 2, H + glucose, ADP, NADP+

Photosynthesis + H 2 O CO 2 Energy Water is broken ATP and NADPH 2 Light is Adsorbed By Chlorophyll ADP NADP Chloroplast O 2 Light Reaction Calvin Cycle Used Energy and is recycled. + C 6 H 12 O 6 Dark Reaction

Concept Map Photosynthesis includes Lightdependent reactions Calvin cycle use take place in Energy from sunlight Thylakoid membranes to produce ATP Go to Section: NADPH O 2 takes place in Stroma uses ATP NADPH of to produce Chloroplasts High-energy sugars