00:01
In this question, we're looking at, so cytotoxic t cells, that means cytotoxic, they kill cells, cytotoxic.
00:12
How are cytotoxic t cells able to recognize infected body cells? body cells.
00:27
So the options are a, infected cell displays foreign.
00:34
Antigen.
00:38
So the reason this isn't entirely correct is, well, it may have some effect with those foreign antigens signaling the cytotoxic t cell.
00:45
We're looking at a self -cell, so the machinery of that cell is going to be hijacked to be producing those antigens.
00:53
They're not going to be coming from, they're not foreign antigens per se for the bulk of them.
00:58
So a is going to be incorrect.
01:00
Whereas b, if we look at it, sounds very similar.
01:03
So it's infected cell produces antigens.
01:11
So this is exactly what we're looking for.
01:14
This is going to be the answer.
01:15
So the infected cell is going to be producing antigens because the virus has hijacked the cell of the cell's machinery in order to reproduce itself.
01:24
So the cell itself is going to be producing those antigens.
01:28
And that's what's going to be recognized by those cytotoxic killer t cells...