00:01
Okay, hello everyone.
00:02
Today we are going to be talking about the amount of heat that is required to denature dna strands, dna double helixes, specifically in regards to the composition of the dna and the length of the dna strand we are talking about.
00:19
First, we are going to talk about some basics, so everyone's on the same page.
00:25
So dna is made up of long chains of nucleotides.
00:31
So each nucleotide has three basic parts, a base, a phosphate, and a sugar.
00:39
So the sugar and the phosphate are pretty much identical in each nucleotide.
00:45
And what changes and varies between each nucleotide are the base groups.
00:51
So there's four base groups that we have.
00:55
So we have, in the upper left here, we have g is guanine, c, cytosine, t, thymein, and a, adenine.
01:04
So these four groups are then broken into two separate groups based on their molecular structure.
01:13
So we have purines and perimidines.
01:16
Addenine, guanyan and purines, and cytosine, thymine, uricil, are perimidines.
01:20
So what uricil is, it replaces thymine when dna is transcribed from dna into rna.
01:30
So we don't have to worry about that right now.
01:34
Yeah.
01:36
So these two groups are complementary.
01:42
So what that means is that adenine, when it's paired, will always bind with thymine.
01:54
And guanine will always bind with cytosine.
01:59
All right...