GLYCOLYSIS
Net Reaction:
Glucose + 2 ADP + 2 Pi
® 2 pyruvate + 2 ATP + 2 NADHAnaerobic=
No O2 required, cytoplasm
KREBS (TCA, CITRIC ACID) CYCLE
Net Reaction:
2 pyruvate
® 2 AcetylCo-A + 2 CO2 + 2 NADH2 AcetylCo-A
® 4 CO2 + 6 NADH + 2 FADH2 + 2 GTPAerobic=
Requires O2, mitochondriaAssume tha 1 GTP = 1 ATP
Þ have 4 ATP net thus far.
ELECTRON TRANSPORT
Net Reaction:
NADH = 3 ATP
FADH2 = 2 ATP
Aerobic=
Requires O2, mitochondriaNADH from glycolysis??
NET REACTION - OVERALL
Glucose
® 6 CO2 + 2 ATP + 2 GTP + 2 NADH + 8 NADH +2 FADH2= 36 moles of ATP
1 mole of ATP = 7.3 kcal
Þ 36 X 7.3 = 263 kcal (trapped energy)1 mole glucose (180g):
3.75 kcal/g
Þ 180 X 3.75 = 675 kcal (gross energy)Efficiency??
(263 realized / 675 potential) X 100 = 39%
Rest of the energy??
Lost as heat!