00:02
Hi there.
00:03
In this question, we want to write down the complementary dna strand for this segment of dna that we have here.
00:11
Before we can do that, there are a couple of things that we need to know.
00:14
One is, is that dna, the two strands, are antiparralal, which means they run in opposite directions.
00:28
So the strand we're given runs 5 prime to 3 prime.
00:31
So the strand we are trying to fill in is going to run from 3 prime to 5 prime.
00:38
It's going to run in the opposite direction as such.
00:41
So they're anti -parallel is what that's called.
00:44
And then the other thing that we need to know is the normal base pairing that we have in dna.
00:54
Well, for the base pairing, adenine and thymine always pair together.
00:59
And cytosine and guanine always pair together...