And let's suppose that the temperature at which our reaction takes place is either room temperature or we can also say it's a body temperature. So it's either 25 degrees Celsius or a body temperature 37 degrees Celsius. Now, before the reaction takes place, we have these single strands of DNA. So we have three of these blue strands and three of these complementary red strands. Now, when this reaction takes place, what do we form? Well, we form three of these DNA molecules that are in their double helix form.