And what are some facts that you have to know about enzymes in general? So this is what we're going to discuss in this lecture. So an enzyme is basically a biological molecule with remarkable capabilities. What they do is they catalyze all of their different types of biological processes and reactions that take place inside our cells. And without the enzymes catalyzing the reactions, cellular processes would essentially hold to a rate that would make life impossible, at least in the way that we know life today. So the first thing you have to know about enzymes is an enzyme is a biological molecule that catalyzes speeds up the rate of reactions.