00:02
Hello students, here we are going to learn about regulation of cell cycle.
00:06
Actually there are three checkpoints in a cell cycle which regulates the cell cycle.
00:23
Number first is the g1 s and number second is g2m and number third is sac.
00:43
Spindle assembly checkpoint.
00:53
These checkpoints are initiated in response to dna damage and this response prevents the transmission of damaged dna to daughter cells.
01:32
So that these cells get time to repair.
01:41
To repair their dna.
01:44
So that the cell cycle can start again.
01:48
In certain cases, the cell repair is irreparable.
01:59
That means the damage is so much that cell cannot be repaired.
02:03
In that case, cell undergoes sense sense or cell death.
02:18
G1 s checkpoint prevents cell from replicating damage to dna.
02:36
Prevents cell from replicating damaged dna.
02:51
That means the cell cannot enter cell division until dna is repaired.
02:58
And the g2m checkpoint prevents cells from dividing with damaged dna.
03:23
That means the dna is repaired in this phase at g1 s checkpoint before that dna is repaired.
03:35
If dna doesn't is not repaired at this stage then it will go into the g to m stage and cells will divide with the damage form of dna.
03:50
Which doesn't happen because we have or the cell has the checkpoints at its place which prevents cell damage...