Glycolysis and Krebs Cycle


This video goes through the whole production of ATP from glycolysis to the Krebs Cycle.


TCA- The Citric Acid Cycle



The above diagram depicts the citric acid/Krebs cycle. This occurs in the matrix of the mitochondria after the Link Reaction (the conversion of 2 molecules of pyruvate to 2 molecules of acetyl-CoA). The acetyl-CoA produced from this reaction enters this cycle. Well you can already see from the diagram all the enzymes and products involved. NOTE that TWO molecules of pyruvate is converted to TWO molecules of acetyl-CoA. This means that this citric acid cycle has to occur TWICE.

The main products to note PER TURN of this cycle are:

  • 1 ATP produced
  • 3 NADH produced
  • 1 FADH2