So some number are produced in glycolysis and then we generate the remaining ATP molecules in a citric acid cycle and on the electron transport chain. But the question is, what is the number of ATP molecules that we actually generate when a single glucose is broken down in in aerobic cell respiration? So this is what I'd like to discuss in this lecture. And let's begin with glycolysis. So glycolysis takes place entirely in the cytoplasm of the cell. And so let's suppose this is the cytoplasm and this is the mitochondrion.