00:01
So this question is about mitosis.
00:03
There are five stages associated with mitosis, the cell life cycle.
00:09
The question listed five of them, a, teleface, b, anapace, c, metaphase, d, interface, and e, prophase.
00:16
So they are not listed in order that they happen naturally in the cell.
00:20
So i'm going to start out with their natural order, which is d, interface, e, prophase, c, metaface, b, anapace, and a, teleface.
00:30
And i will actually match the events associated with the phases in the natural order.
00:37
So now let's start with the first one.
00:40
So remember, this is the process of a mitosis.
00:42
So i'm going to write it down.
00:44
The very first phase we're talking about is the interface.
00:53
So interface is a phase that before the actomatosis or the division of dna.
00:59
So during interface, there are three different subfaces, g1, s and g2.
01:05
During those interfaces, the main events are cell growth, so that cell will grow to a certain size to be ready to divide, and also all the organelles and proteins, enzymes, they must be replicated, getting ready for the cell division.
01:21
And there is also a very important event we call the dna replication, which happened during s phase.
01:27
So the main event here is cell growth, and enzyme getting ready, protein getting ready, and also dna replication.
01:42
Again, dna replication happens during s phase.
01:45
This is a critical step because dna will be doubled amount so that when a cell divide, the 2 -dolar cell will have the same genetic content as the parent cell.
01:55
So this is the first stage of the mitosis interface.
02:00
Now, the actual mitosis moves along, and so the next phase will be e -proface.
02:07
So now i'm going to draw on the chromosome inside of the cell so you can have a more direct or more straightforward vision of what's going on in the cell dermatosis.
02:21
So first of all, the nuclear membrane, you can see that it started to break down.
02:27
Now the chromatine, which is the more dispersed, loose structure will actually condense the form a chromosome.
02:33
As you can see, i use x to represent the structure of copy or replicated dna, which is a chromosome.
02:45
So you can see that there are two different events associated with prophes from the questions.
02:51
First of all, chromatin become condensed and they will become chromosome.
03:06
So you can actually see the structure of a chromosome.
03:08
That's the first event that it associated with perfids.
03:11
And the other is the nuclear membrane.
03:17
They will be actually broken down.
03:19
Or in this case, nuclear membrane degraded.
03:27
And other events, including the mitotic spindle being grown so that they are ready to attach to those chromosomes.
03:37
And also, if it's an animal cell, the central zone will be moved towards the opposite pole of the cell, getting ready to pull the, the, chromosome away from the center.
03:49
Alright, now the next stage will be metaphase.
04:02
The metaphase has the most signature event of all the chromosome lining in the middle or center of the cell.
04:13
So you can see if it's an animal cell, then the centriism are lined up in the opposite pole of this cell, and then the mitotic spindle actually captured the centromere of the chromosome so that, you know, there are, there is one my heartless spindle on each side of the chromosome, which will be a balanced force so that all the chromosomes, they're actually lined up in the middle or the center of the cell.
04:45
So this is the signature feature of metaphase.
04:49
So now i'm going to write down the event over here.
05:10
So dye adds, diads are actually a different name for chromosome because during metaphase, these chromosomes, they have two copies...