The fluid mosaic model states that membrane proteins Se... (2023)

Although lipid molecules can diffuse freely in the plane of the bilayer, they cannot rotate across the bilayer unless enzymatic catalysts called phospholipid translocators are present in the membrane.

This question refers to our cell or plasma membrane which is a barrier to protect all types of cells. The plasma membrane is often said to have a fluid mosaic structure. We call the fluid mosaic model um fluid, which means that it is not a rigid structure. There is fluidity in the movement and the mosaic, which means that it is made up of many different components. So our main component is our fossil Olympiads, and there are two sides to what has a front and a tail. And all of these stories are hydrophobic, which means they basically don't like water. And so all the details are turned inward. And the heads are hydro Filip, water, so they look out. And so it forms a lipid bilayer. So when we look at our different components, these are our nutritional lipids, there are many other components, including proteins. So where these proteins are is what we're going to look at, and that's the main area where our proteins are, and their main function is to act as channels that allow molecules to flow certain substances in and out of the cell, so they create different channels which they called integral proteins. So we can put this protein in and it has this channel that can open to the outside of, say, the cell and into the cell. Um, this is like a baby protein that filters substances. So this is our protein. And to see our options for this question, here the proteins are not distributed in a continuous layer across the inner and outer surfaces of the membrane. You find other molecules. Other types like, oh, proteins, carbohydrates that are sold outside. It may have some sort of protein in it, but it's not spread in a continuous layer all over the place. Really. Also, in different random areas, they are not limited to hydrophobic. It is our inside. Where we put our tails, um, they reached the outside of the cell near the Hydro Filic area, and the rest randomly oriented on the membrane without fixing on the inside. Extremely funny which is not true the proteins in our fluid mosaic model are said to be ah per layer of fossil lipids within the proteins embedded in that bilayer so that would be our answer where we see them embedded as in our image in the lipid, vile air or in the posterior lipid.

The question in the seventh chapter asks us what the fluid mosaic model describes. Sorry AA, a question from chapter seven. Ask how Yes, the fluid mosaic model describes the proteins within the membrane. So remember, in the mosaic model of food, the proteins are basically inside a membrane that moves up and down. But it's important to remember that these proteins will need to sit at certain specific locations and allow the proteins to carry out the functions that need to occur within that particular region. So is it correct to say that they extend in a continuous layer across the inner and outer surfaces of the membrane? No. Because again, these proteins that have to be there are going to have to be located in a specific area and instructed to do the functions that they're supposed to do. Are they confined to the hydrophobic interior of the membrane? No, that's not true either, because we can have our membrane and proteins that move up and down through the protein or what we can have is that we can have, um, proteins that will go all the way through the protein. I mean the entire membrane. and thus would certainly not be limited to the serrated hydrophobic interior of the membrane, so we can cross this option out as well. However, they will embed whether they are completely embedded within the protein or only embedded if the protein is completely embedded in the membrane or if the protein is partially embedded within the membrane. The proteins are definitely, uh definitely attached to the membrane, uh, and somehow. And so, ah, seeing would really be the answer that we're looking for because our proteins will be intimately associated with the membrane. We have a lot of proteins that are tightly bound to the membrane, so that would be our correct answer. Andi, are they randomly oriented on the membrane with no fixed internal external polarity? No, certainly not. So, for example, if you have a receptor molecule, you probably want the receptor part of the molecule to be outside the membrane so that we can perform our receptor function and carry the signal into the cell. So if we have a receptor on the outside, there would be certain molecules that would come and bind to the protein so our signal could get into the cell. So it's certainly very important that the orientation of the molecule is maintained within this, ahem, plasma membrane. Even if he hovers around two per cast, he's still somewhat capped, and Theo Arn Tae Shin is really important.

This question raises the question of where the proteins are mainly found in a member of a cell. So here we have a misplaced image. What is a cell membrane? This place is Thea outside the cell. This place is inside the cell, and you can see that it's made of a lipid bilayer. Now this bully is made of these yellow structures that are complete false lipids in the cell membrane. We have these pink structures, they're embedded in the cell membrane, and these pink structures are proteins, so they're embedded in the cell membrane throughout the cell. This allows proteins to perform certain functions in the cell membrane, such as allowing macromolecules to pass in and out of the cell by creating channels through which the molecules can pass. So the answer to this question is the letter C.

This question refers to the fluid mosaic model of the cell membrane and we will begin by looking at a cross section of the lipid bilayer that forms the exterior of the cell. And right here we have our two fossil lipid layers, with our hydrophilic heads and our hydrophobic tails, and within the entire lipid layer. We have certain other molecules that allow ions and other molecules to pass through, so we have cholesterol. Here we have proteins that can act as gates or other markers. We have lipids, which can also act as markers, and proteins that can only be found on the surface. And all these things are constantly moving over the fossil lipid bilayer. They are not just stagnant and immobile. This is These molecules, yes, they cannot stay in one place. And what they mean by the fluid mosaic model is that these molecules are in constant motion and they're not going in and out. But it is a more fluid environment. These molecules don't live in a solid environment, so the fluid mosaic model outside the cell membrane is made of proteins and lipids that can actually move.