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