Saturday, April 16, 2011

Aerobic Respiration - Krebs cycle

1. Krebs cycle:
  • biochemical reactions occurring in all living cells,
  • in the inner membrane of mitochondria.
  • involves a metabolic pathway (pyruvate --> CO2 + H2O) to generate energy.
  • also called citric acid cycle or trycarboxilic acid (TCA) cycle.

2.  Acetyl CoA initiates the Krebs cycle (by combining with oxaloacetate (4C) --> citrate).
3.  Citrate is decarboxilated and dehydrogenated.
4.  Energy stored = NADH, FADH2 and GTP.
5.  2 mol of CO2 are released (as waste product).
6.  NAD + FAD = H acceptors.
7.  1 mol of  ATP is gained.
8.  provides H for use in ETC (as energy for formation of ATP).

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