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AP Biology
Chapter 9:Cellular Respiration
LE 9-2
ECOSYSTEM
Lightenergy
Photosynthesisin chloroplasts
Cellular respirationin mitochondria
Organicmolecules
+ O2CO2 + H2O
ATP
powers most cellular work
Heatenergy
Cellular Energy
ATP Structure
Phosphorylation using Free energy
LE 9-3
Reactants
becomes oxidized
becomes reduced
Products
H
Methane(reducing
agent)
Oxygen(oxidizing
agent)
Carbon dioxide Water
H C H
H
O O O OC OH H
CH4 2 O2+ ++CO2Energy 2 H2O
Electron Transport Chain is is ALWAYS located on a membrane
Oxygen is at the end
Process of Cellular Respiration
Energy Investment Phase
Energy Payoff Phase
LE 9-10
CYTOSOL
Pyruvate
NAD+
MITOCHONDRION
Transport protein
NADH + H+
Coenzyme ACO2
Acetyl Co A
Fig: 9.12Kreb’s Cycle Simplified
Actual Kreb’s Cycle
Electron Transport Chain is located on the inner FOLDED membrane
Electron Transport Chain(Proteins are H+ Pumps)
Pumping H+ into a confined space
LE 9-15
Protein complexof electroncarriers
H+
ATP ATP ATP
GlycolysisOxidative
phosphorylation:electron transportand chemiosmosis
Citricacidcycle
H+
Q
IIII
II
FADFADH2
+ H+NADH NAD+
(carrying electronsfrom food)
Innermitochondrialmembrane
Innermitochondrialmembrane
Mitochondrialmatrix
Intermembranespace
H+
H+
Cyt c
IV
2H+ + 1/2 O2 H2O
ADP +
H+
ATP
ATPsynthase
Electron transport chainElectron transport and pumping of protons (H+),
Which create an H+ gradient across the membrane
P i
ChemiosmosisATP synthesis powered by the flow
of H+ back across the membrane
Oxidative phosphorylation
Fig: 9.14ATP Synthetase Complex
Is Oxygen present?
Fig: 9.17aAlcohol Fermentation
Fig: 9.17bLactic Acid Fermentation
LE 9-19
Citricacidcycle
Oxidativephosphorylation
Proteins
NH3
Aminoacids
Sugars
Carbohydrates
GlycolysisGlucose
Glyceraldehyde-3- P
Pyruvate
Acetyl CoA
Fattyacids
Glycerol
Fats
LE 5-UN78
Aminogroup
Carboxylgroup
carbon
LE 5-11b
Ester linkage
Fat molecule (triacylglycerol)
Negative Feedback
Phosphofructokinase(Puts on the SECOND ATP)
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