In bacterial cells, the enzyme is called beta galactose, sedase. And so these two enzymes are responsible for breaking down this same energy source in different organisms, one in humans and the other in bacterial cells. And finally, let's take a look at sucrose. Now, sucrose is what we call table sugar. And sucrose is the mobile form of carbohydrates that is found in plants. And we obtain sucrose from cane plants or beet plants.