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Photosynthesis (Light-Dependent Reactions (Light (electromagnetic…
Photosynthesis
Light-Dependent Reactions
Light
electromagnetic radiation spectrum
Pigments
absorption of wavelengths gives us color
Photosystem 1
Produces NADPH
Photosystem 2
ATP synthesis
inside of the chloroplast
Anabolic Metabolism
Intermediate-term storage
simple sugar and disaccharide sucrose move around
weeks to months
Long-term storage
starch= too large to be transported
last for years
Short-term storage
ATP and NADPH can only be used briefly
Energy and reducing power
Energy Carriers
Photophosphorylation
subtrate-level phosphorylation
oxidative phosphorylation
Reducing power
oxidize compouds
reduced compounds
oxidizing agents
reducing agents
NADH and NADP+
Other Electron Carriers
Plastoquinones
transports electrons over short distances in membrane
Plastocyanin
a small protein that carries copper atoms
Cytochromes
small protein that contain a heme, that holds an iron atom
Leaf Structure
the structure of the leaf depends on its climate
Calvin Cycle
conversion of CO2 to carbohydrates
Light
Sunlight is pure white
clear day= more photosynthesis
duration of sunlight
Water
when the stomata is closed at night, the plant retains water
C4 Metabolism
water lost and CO2 absorbed
occurs in leaves with Kranz anatomy
