PHOTOSYNTHESIS 1 – LESSON 41 SWBAT DETERMINE THE PRODUCTS AND REACTANTS OF PHOTOSYNTHESIS WHAT DO CHLOROPLASTS DO? WHERE ARE THEY FOUND? READING VOCAB •Atmosphere=surrounds earth (contains air) •Cyanobacteria=type of bacteria •Toxic=poison PHOTOSYNTHESIS: PROCESS CONVERTING LIGHT INTO CHEMICAL ENERGY • Energy is stored in organic molecules • Performed by most plants, fungi and cyanobacteria • Performed differently by each species • Evolved before oxygen THYLAKOID: COMPARTMENT FOUND INSIDE THE CHLOROPLAST • Site of light reaction of photosynthesis • Typically form stacks called grana • Most important part is its membrane LIGHT REACTIONS: LIGHT ENERGY IS CONVERTED TO CHEMICAL ENERGY IN FORM OF ATP • Also called light-dependent reaction and photoreduction • Requires Water • Occurs on thylakoid membrane • Consists of electron transport chain • Final electron acceptor NADP • First electron donor is Water • Creates Oxygen ELECTRON TRANSPORT CHAIN: SERIES OF COMPOUNDS THAT TRANSFER ELECTRONS • Located on thylakoid membrane • Contains two photosystems • Water donates electron and gets converted to oxygen • Light hits each photosystem • NADPH and ATP are made • ATP is made by ATP Synthase PHOTOSYSTEMS: TWO PROTEINS IN ETC THAT USE LIGHT AND TRANSFER ENERGY • Photosystem II is first part of ETC • Splits Water • Light gets absorbed by chlorophyll at center • PS I reduces NADP to NADPH using light energy PRODUCTS OF THE LIGHT REACTION •NADPH, Oxygen and ATP •Products go to power Dark reactions