00:01
During the replication of dna, dna polymerase synthesizes the daughter strand in the 5 -prime to 3 -prime direction because it can only join nucleotides to be 3 -prime end of the growing strand.
00:12
True or false.
00:15
Okay, so this is true.
00:17
Let's look at why.
00:19
So i'm going to draw a nucleotide.
00:23
So we've got a phosphate group.
00:25
We've got a sugar, deoxyribose, and we have a nitrogenous base.
00:33
Okay, the important points we need to look out are the fifth and the third carbon.
00:39
Because if i label the carbons, this is one, two, three, four, and five is up here attached to the phosphate group.
00:49
So the important ones are five and three, those ones involved in linking it to the next nucleotides.
00:59
Okay, so at the third carbon, there is a hydroxyl group.
01:08
And on the phosphate, group, the phosphorus is connected to oxygen molecules, oxygen atoms i mean...