Photosynthesis
description
Transcript of Photosynthesis
Autotrophs and Heterotrophs
• Autotrophs are organisms that make their own food
• Heterotrophs are organisms that need to ingest food to obtain energy
Photosynthesis• How plants (and some other organisms) use
light to convert water and carbon dioxide into oxygen and sugar!
Chloroplast
Lumen (inside thylakoid)
Outer membrane
intermembrane space
Inner membrane
Stroma
thlakoid
grana
Photosynthesis
Light reactions
Dark Reactions
Photosystem II
Photosystem IIn thylakoid membrane
(aka… The Calvin Cycle)In stroma
Light reactionsIn thylakoid membrane
P680
photons
P680
ETR
ATP
P700
P700
ETR
ATP
Photosystem II Photosystem I
NADPH
• Hydrogen ions flow through a channel in the thylakoid membrane
• ATP synthase attachedto the channel makesATP
How ATP made in light rxn?