00:03
In order to answer this question, let's talk about dna.
00:06
This is a replication fork is shown schematically below.
00:11
The dashed lines represent newly synodized dna.
00:14
So here you have your parental strands of dna, the solid black, and the dashed lines represent the newly synthesized dna.
00:21
So as you can see here, the strand level a is called, remember that the enzyme responsible for synthesizing the new strand of dna is called dna polymerase.
00:33
And this dna polymerase polymerizes in this direction from 5 to 3.
00:39
So as you can see here, the direction of replication is going in this direction.
00:45
If this is the 3 -end, then it means that this is the 5 -end.
00:50
So in this case, this is, or your dna polymerase is polymerizing in this direction, in this direction from 5 to 3.
00:58
The strand that goes in the same direction as the, or the strand that is being replicated in the same direction, as the replication fork, it is known as the leading strand.
01:10
And the strand that is being synthesized in an opposite direction to the replication for it is called the lagging strand.
01:18
So in this case, this is the 5 -end and this is the 3 -end.
01:21
But this is the direction of the parental strand.
01:24
What about the newly -synthized strand? this is going to be the 3 -end and this is going to be the 5 -ed.
01:32
So your dna is being happening in this direction...