And our aerobic cellular respiration actually involves four important processes. So we have the process of glycolysis, we have pyruvate decarboxylation, we have citric acid cycle, also known as known as the KREP cycle or the tricarboxylic acid cycle. And we have the electron transport chain that involves oxidative phosphorylation. So let's discuss each one of these processes briefly and then let's summarize our results into the following table that basically describes how many ATP molecules are synthesized by each one of these individual processes. And let's begin with the process of glycolysis. Now, glycolysis is the breakdown of a glucose molecule into two ATP molecules, into two NADH molecules and two Pyruvate molecules.