enough food, a tiny amount of starter bacteria will multiply, and then you have
a lot of little factories running your production line..
-
+As in a big factory, our little biofactories need machines to build their
+products. In biology, these machines are called enzymes. Some of these perform
+the complex chemical reactions needed to build up products. Others act as
+sensors that tell the cell about it's environment. Regulators act on the input
+from these sensors and allow the cell to adapt to these changes. Last but not
+least, there's special machines that build new machines. Those are called
+ribosomes, and we'll have a closer look at them in a minute.
+
+The cell is able to select which products it wants to create and build.