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Chapter 10: Energy Metabolism Photosynthesis (Photosynthesis (Stroma…
Chapter 10: Energy Metabolism Photosynthesis
Photosynthesis
Stroma Reactions
ATP + NADPH + CO2 = Carbohydrate
allow for 3-phosphate-glyceraldehyde to be drawn out of the chloroplast
RUBISCO
not too ideal but can get the job done
mediates C-3 metabolite quantity
Not bound in thylakoid membrane
Anabolic metabolism
Storage forms depend on time until use
builds more complex molecules from 3PG
Light- Dependant
thylakoids
In Granum clusters
In chloroplasts
#
ATP and NADPH
Light
Pigments can absorb light
dependent on melanin content
chlorophyll a
Red
Blue
Visible light spectrum is small
Electrons
absorption spectrum
strongest absorption
action spectrum
effective
Excitement
Discharge of light when falling
fluorescence
Wave-particle duality
accessory pigments
other colors
Chlorophyll B
Photosystem 2
#
phaeophytin contributes to p680
plastocyanin donates to reverse the oxidation occurring in P-1
ATP synthesis
proton gradient drives ATP Synthase
non-cyclic electron transport
cyclic electron transport doesn't create excess NADPH
Energy and Reducing Power
Entropy
Sunlight reverses entropy locally, but not cosmically
Increases constantly
Death results in more entropy
Organisms
Autotrophs
#
Heterotrophs
Energy Carriers
substrate-level phosphorilation
oxidative phosphorilation
guanosine triphosphate
Electron Carriers
plastoquinones
plastocyanin
cytochromes
Reducing
Oxygen
electro-negativity
more electrons
Environmental
Light amount
quantity
intensity
duration
time of exposure
quality
color
Internal
leaf structure
light absorption
water retention
water
availability
C-4 metabolism
photo respiration
water use efficiency
CO2 stored in the leaves
O2 kept from RUBSICO
PEP carboxylase
CAM
Occurs at night in desert plants
Water retention
Coordination
Photosystem 1
#
ferredoxin reduces NADP+ via and enzyme
low C-B
p700
Abilities
