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9/1/2011
1
Autotrophs are the producers of the
biosphere
Photosynthesis occurs in chloroplasts
in plant cells
9/1/2011
2
The Chloroplast
Plants produce O2 gas by splitting
water
Photosynthesis is a redox process, as is
cellular respiration
9/1/2011
3
Overview: The two stages of photosynthesis are
linked by ATP and NADPH
Visible radiation drives the light
reactions
Interaction of light with a chloroplast
9/1/2011
4
Photosystems capture solar power
Two photosystems connected by an electron
transport chain generate ATP and NADPH
Chemiosmosis powers ATP synthesis in
the light reactions
9/1/2011
5
ATP and NADPH power sugar synthesis
in the Calvin cycle
Review: Photosynthesis uses light energy,
CO2, and H2O to make food molecules
Adaptations that save water in hot, dry
climates evolved in C4 and CAM plants
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