00:01
Let's ask this question.
00:01
Let's talk about receptors.
00:03
It says the uptake of cholesterol from the blood, which of the following is correct.
00:07
Okay, so we have many options here.
00:10
It says option that requires the formation of a clathrin code which forms after the binding of the adapter with protein 2 to the low -density lipoprotein receptor.
00:21
Option a is false because cholesterol in the blood is not directly taken up by the liver.
00:28
Remember that cholesterol are within, ldl.
00:32
Okay, so this ldl molecule is a lipoprotein that contains cholesterol molecules.
00:39
It is something like this, this is your ldl, and here you have your esters of cholesterol.
00:44
And there are receptors on the liver, something like this.
00:49
There are pets, and these pets contain receptors for ldl.
00:53
And this ldl receptors are going to recognize the apple type of protein, b100, and it is going to bind to this ldl.
01:02
And then clathric molecules bound here are going to pull these pits inwards, and it's going to produce a vesicle containing surrounded by clattering molecules.
01:11
So option a is false.
01:14
Option b says it's detrimental to your health, so drugs that would completely block low density, leprotein uptake into all cells by receptor mediated cytosis would improve patients ' health.
01:27
And this is false because cholesterol or high levels of cholesterol are, detrimental to a person's health, but cholesterol is also part of many structures in the cell that are very important for the cell to work properly.
01:45
So it means that if you completely block the low density lipoproteins uptake into the cells, then it is going to be detrimental to your health.
01:55
So option b is also false.
01:57
Now we have option d that says option c, i'm sorry, that says, occurs by phygocytosis of low, density lipoprotein particles and this is false because this process here is not called our cytosis it is called receptor mediated endocytosis option this is occurs by ldl and low density lipoproteins it means ld are particles made up entirely of cholesterol esters that is an insoluble form of cholesterol and no other type of molecules so this option is true and this is the answer for this question option is is occurs primarily by fluid phase endosytosis and this is the most efficient mechanism for nutrient updicking cells, and this is also false...