Zusammenfassung der Ressource
Glucose Oxidation
- Glycolysis
- does not involve oxygen
- little energy is produced - only
2 ATP per glucose
- end products in presence of
oxygen = pyruvate and NADH
- NADH re-oxidation is achieved by
the enzyme lactate dehydrogenase
which converts pyruvate to lactate
- lactate is released into the
blood and recycled by the liver
- Citric Acid Cycle
- most of the cells energy is
made in the mitochondria
- occurs in matrix of mitchondria
- pyruvate is fed into the citric acid
cycle by acetyl-coenzyme A
- Acetlyl CoA = acyl group carrier
- Oxidative decarboxylation of pyruvate
- two molecules of carbon dioxide are formed
- two electrons are
transferred to NAD+
- 3 NADH are produced
- 1 FADH produced
- acetyl group is transferred to CoA
- large free energy decrease
- Electron transport chain
- delta G for the transfer of
electrons from NADH to oxygen to
form water is -220kJ mol
- determination of redox potentials
- a more negative redox potential value
signifies more readiness to donate electrons
- Eo values
- all coponents at 1M
- hydrogen gas at
1 atmospheric
pressure
- pH = 7
- relationship between
Gibbs free energy and
redox potential difference
- delta G = -nFdeltaEo