Now, what will begin to happen? Well, what will happen is the complementary DNA primer will hybridize itself to this section here as shown in the following diagram. So this is our DNA primer. It will form these base pairs as shown in the following diagram. So T base pairs with a G, base pairs with C, and C base pairs with G. And then the DNA polymerase will bind onto the primer and it will use the hydroxyl group on this cytosine to basically form that first phosphodiaester bond. And so it will take a thymine.