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Windmills Harnessing the Flow of Air
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Adenosine Triphosphate
Energy from photosynthesis or cellular respiration
Windmills Harnessing the Flow of Air
Sawmills Harnessing the Flow of Water
Chemiosmosis
H+ H+
H+
H+H+
H+
H+ H+
H+
H+
H+
H+H+
H+
H+
H+H+
H+
H+
H+
H+H+
H+
H+
ADP PATPADP PATP
ATP Synthase
ChemiosmosisHarnessing the flow of protons to make ATP
H+H+H+
H+ H+
H+
H+
H+ H+
H+
H+
H+
H+
H+
H+H+
H+
H+
ATP Synthase
Needs:Proton (H+) gradientATP synthaseADP and P
H+H+H+
H+
Electron Transport ChainUsing E from electrons to build a proton gradient
Electrons release E as they move down the ETCETC pumps protons across membrane
H+ H+
H+H+ H+
H+
ADP PATP
H+
H+H+
e-
Review Questions1. How can a cell put together ADP and
another phosphate to form ATP?2. How can a cell build up a proton
gradient (a difference in concentrations of protons across a membrane)?
3. How can a cell energize electrons?4. What problem(s) might arise if the
membrane used is the cell membrane?