But because glucose produces two acetyl coenzyme A, ultimately that means that this cycle will actually take place twice for any single glucose molecule. So a single glucose molecule breaks down to two pyruvates. And since each pyruvate creates that acetylco enzyme A, we have two of these acetylcoenzymes A. So this citric acid cycle takes place twice for any given glucose molecule, and this citric acid cycle takes place within the mitochondrial matrix of the mitochondria found within the cell. So let's take a look at each one of these eight steps. And we're not going to focus too much on the detail, because each one of these steps is actually pretty complicated.