photosynthesis compare and contrast to cellular respiration in what order are the reactions? where...
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Photosynthesis In what order are the reactions? PhotosynthesisCellular Respiration Light ReactionGlycolysis Dark Rxn (Cycle)Kreb’s Cycle ‘Glucogenesis’Electron Transport ChainTRANSCRIPT
Photosynthesis•Compare and Contrast to Cellular
Respiration• In what order are the reactions?•Where do they occur?•Reactants? Products? • Electron acceptors and ‘donors’?
Photosynthesis• In what order are the reactions?
Photosynthesis Cellular RespirationLight Reaction Glycolysis
Dark Rxn (Cycle) Kreb’s Cycle
‘Glucogenesis’ Electron Transport Chain
Photosynthesis•Where do
they occur?
Photosynthesis•Reactants? Products?
P-synthesis
Reactants Products Cell.Resp.
Reactants Products
LDR Glycolysis
Dark Rxn Kreb’s Cycle
‘Glucose’ Electron Transport
Chain
NADP+, ADP, WATER, LIGHT
NADPH, CO2
Two, 3-C compounds
NADPH, ATP, Oxygen
3-C cmpd, NADP+, ADP
GLUCOSE (6-Carbons)
Glucose, ATP, NADH
3-C compound NAD+, FAD
NADH, FADH2, Oxygen
TWO, 3-C cmpds,
ADP, NAD+
NADH, FADH2,
CO2
NAD+, FAD, WATER, ENERGY
Photosynthesis•Donors? Acceptors?
P-synthesis Cellular Respiration
LDR Water – Donor NADP+ - Acceptor
Glycolysis NADH - Donor
Dark Rxn (Cycle)
NADPH – donor ‘molecule’ - accept
Kreb’s Cycle NAD+ - Acceptor
‘Glucogenesis’ Electron Transport
Chain
NADH - donor Oxygen - Acceptor
Cellular RespirationGlycolysis
Glucose
2 NAD+
“2” ATP
2 NADH
4 ATP
2 Pyruvate Acetyl- CoA
Coenzyme A CO2
Kreb’s Cycle
2-carbonsNADH
FADH2
CO2
ETC32 ATP
water
heat O2
Photosynthesis
‘Glucogenesis’
Glucose
NADP+
“2” ATP
2 NADPH
ATP
CO2
DarkRxn
3-carbons
Light Reaction
water
O2 ADP ADP
NADP+
Two3-carbon molecules
Leaves and P-syn
• Need to open ‘stomates’to let CO2 in
• Water will go from…• So plant will lose water• Will dry in drought
Drought Adaptations• In photosynthesis (C3), plants take in
CO2 right to the Dark Reaction•C4 – uses an intermediate, instead of
taking in CO2 ‘directly’
Takes ATP!!!!
C4 – drought resistant•Rice is the world’s major grain•Half the world’s staple• It’s a C3 plant• If ‘you’ could genetically engineer it to be
a C4 plant…
C4 – drought resistant
In prolonged drought (desert) situations an alternative is needed
• In the desert, what part of day is hottest, driest?•What would be the best time of day to be
“open” to get CO2?•CAM plants do this
Crassulacean Acid Metabolism
CAM
CAM – desert resistant• ‘Fix’ CO2 during the night and save for
daylight• LDR with CO2 captured at night•Costly for the plant, but it’s better than
dying
CAM – desert resistant
Homework•Answer to Obj 14•Review for Final