So for one glucose that basically is broken down in glycolysis, we produce two pyruvate molecules, as shown in this region. Now, once these pyruvates are formed, they are present in the cytosol. And if we have oxygen present in the cell, the cell can basically undergo a process known as cellular respiration. So if the cell contains oxygen and it commits to cellular respiration, these two pyruvate molecules are then transported into the mitochondrial matrix of the mitochondrion inside that cell. So let's say this is the cytoplasm of the cell. This is the mitochondrion, which contains the outer membrane, the inner membrane.