00:01
Okay, so this question relates to the structure of the cell membrane, particularly as it relates to carbohydrates and where you would find them.
00:15
Okay, so now in terms of the structure of the cell membrane, you can see here it's mainly this phospholipid bilayer.
00:24
Okay, two layers of phospholipids, and it's got a bunch of proteins stuck all over.
00:30
But we're not talking about those.
00:31
We're talking about the carbohydrates.
00:33
Where do they go? well, let's first do the sidedness of this membrane.
00:39
So let's make this side here, the inner part of the cell, and this part here, the outer of the cell, part of the cell.
01:06
Okay, now where we find these carbohydrates is pretty much, because of what they do, what their job is.
01:16
Shape determines function.
01:18
That's very big in cells.
01:20
Okay, so carbohydrates, their main function is as id tags.
01:26
They serve in recognition.
01:30
That's the main function of the carbohydrate.
01:32
So obviously, if this is going to be like an id tag that other things, other cells are going to be able to recognize this cell or that part of the cell membrane, obviously they have to be on the outer portion of the cell...