00:01
What are positive cell cycle regulators? as the name suggests, it's descriptive of what they do.
00:10
They regulate the cell cycle in a positive manner, which means that they upregulate it, so they promote it.
00:18
And under normal circumstances, this is needed and necessary for growth and repair.
00:28
So in normal circumstances, this is what it looks like, just one cell becoming two happy cells when it is necessary.
00:37
However, when you mutate these positive cell cycle regulators and they no longer function like they should, you get some sort of aberration that could result in a tumor.
00:51
An example of a positive cell cycle regulator are proto -oncogenes.
00:58
And they are called proto -oncogenes because they are what gets mutated usually to oncogenes, which are cancer -causing genes.
01:09
So let's look at our answer choices and see what they mean.
01:14
Transformation genes are not a thing, so choice a is incorrect.
01:18
Choice b is tumor suppressor genes.
01:22
Tumor suppressor genes, as the name suggests, suppressed division.
01:26
So choice b is not correct...