Yet all these different types of cells have to carry out identical types of reactions. For instance, to see what we mean, let's imagine we have a cardiac muscle cell and a skeleton muscle cell. So we have two different types of cells that are found at two different types of locations. So cardiac muscle cells found in the heart and skeleton muscle cell is basically found around the bone. Now, cardiac muscle cells are found in a rich oxygen environment, but it's the skeleton muscle cell that is found usually in a lower oxygen environment. But both of these different types of cells found under different conditions must carry out the same type of biochemical process, namely let's say glycolysis.