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CH. 10 ENERGY METABOLISM: PHOTOSYNTHESIS (ENVIRONMENTAL FACTORS…
CH. 10 ENERGY METABOLISM: PHOTOSYNTHESIS
Entropy=disorder
Photoautotrophs-plants
energy from light
Heterotrophs-animals
energy from plants
Photosynthesis
stroma reactions
C3 CYCLE
Calvin/Benspn cycle
carbon dioxide-->carbohydrate
anabolic metabolism
Anabolic pathways
polysaccharides
fats
Storage for energy + carbon
short: NADH + ATP
intermediate: glucose + dissacharicde sucrosr
long: starch
light-dep. reactions
color spectrum
rainbow
ENVIRONMENTAL FACTORS
C4 Metabolism
water use efficiency
carbon dioxide diffusion
Photorespiration=energy wasting
protects plant
30% ATP + NADPH lost
HIGH CO2 (absorbed)
LOW O2 (kept away)
Leaf Structure
Crassulacean Acid Metabolism
more water conservation
Permits photosynthesis
almost same C4 metabolism
Light
Water
Energy
Carriers
ADP
ATP
ELECTRON CARRIERS
Plastoquinones
long hydrocarbon tail
picks up 2 electrons
binds 2 protons
Plastocyanin
metal-copper
Cytochromes
Iron
LIGHT ENERGY--->CHEMICAL ENERGY
Reducing Power
force electrons on compounds
Plants take CO2 + H20
CONVERT TO REDUCED COMPOUNDS
CARBS + FATS
