cellular respiration within mitochondrium
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GENERAL REACTIONS – overall pathway is exergonic
GLYCOLYSIS
Where:
cytoplasm
General:
Does not use O2
Energy from substrate
Most ancient of pathways
Overall pathway:
Glucose 2 pyruvate
net 2 ATP
2 NADH
CITRIC ACID CYCLE & e-TRANSPORT CHAIN
Where:
mitochondrium
General
Uses O2
Overall pathway:
Pyruvate 6CO2 + 6H2O
36 ATP
Produces large amounts of ATP with O2 acting as e- acceptor.
Occurs in the Mtiochondrium
1. Acetyl CoEnzyme A
EACH PYRUVATE GENERATES:
1 NADH
1 CO2 (RELEASED)
Coenzyme NAD+
+H
NADHCO2
ACETYL CoA
PYRUVATE
CoA
CoA
2 CO2
ATP
ADP +
P
2. Citric acid cycle/
Krebs Cycle
3 NAD+
3 NADH
FAD
FADH2
EACH PYRUVATE GENERATES:
3 NADH 1 FADH2
1 ATP 2 CO2
OXALOACETATECITRATE
3. ALL COMPOUNDS AT THE END OF THE KREBS CYCLE – THIS
IS FOR TWO PYRUVATES
CO2 ATP NADH FADH2
GLYCOLYSIS0 2
made directly
2 0
ACETYL Co-A
ACTIVATION2 0 2 0
KREB CYCLE4 2
Made directly
6 2
1
2
Fig. 6-11a
Space
betweenmembranes
Inner
mitochondrial
membrane
Electron
carrier
Protein
complex
Electron
flow
Matrix Electron transport chain ATP synthase
NADHNAD
FADH2 FAD
ATPADP
H2OO2
HHHH
H
H
H
H
H
H
H
HH
HH
HH
HH
H 2
P
SPECIFICSGENERATED ATP
per Glucose
(= 2 pyruvate)
1. GLYCOLYSIS 2 NADH 6 ATP
2 ATP (directly)
2. ACETYL CoA 2 NADH 6 ATP
3. KREBS 6 NADH 18 ATP
2 FADH2 4 ATP
2 ATP
3 ATP per NADH
2 ATP per FADH2
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