00:01
This question asks which plasma membrane component can be either found on its surface or embedded in the membrane structure.
00:09
Our answer choices are protein, cholesterol, carbohydrate, and phospholipid.
00:16
So as we know, our plasma membrane consists of a phospholipid bilayer, meaning that there will be all of these phospholipid heads on the outside filed by, the fatty acid tails and then another set of fatty acid tails that will link to plasma phospholipid heads and then thus this is what we refer to as the plasma membrane and an individual one of these units is going to be a phospholipid so to say that phospholipids are going to be embedded in the membrane structure is true however they will not be found on the surface of the membrane.
01:10
So choice d will be incorrect.
01:13
Carbohydrates will only be found on the surfaces of the membranes.
01:18
They will not be found embedded in the structure.
01:20
So choice c is incorrect as well.
01:24
Choice b, cholesterol.
01:26
Well, cholesterol is actually going to be quite interesting because it will regulate the membrane fluidity.
01:32
And it does so by being inserted right here...