Of the following cell membrane lipids, which one 1) prefers to reside in the inner leaflet (or inner half) of the membrane bilayer, AND 2) is not zwitterionic at physiological pH (7.4)? 1. SM (sphingomyelin) is inner-leaflet & NOT zwitterionic 2. PC (phosphatidylcholine) is inner-leaflet & NOT zwitterionic 3. PS (phosphatidylserine) is inner-leaflet & NOT zwitterionic  4. 2 of these 3 responses are correct

Q: The activity of a pore-forming membrane protein, PorinA1, was tested in different lipid bilayers at…

A: Biological membranes are lipid bilayers, which provide structure to the cells. Biological membranes…

Q: Which of the following statements about membrane phospholipids is/are true?   a)  They are…

A: All living things are made up of cells, which are the most basic and important unit. All of life's…

Q: Do you think sodium (Na+) or chloride (Cl-) ions can diffuse directly through the lipid bilayer? How…

A: Lipid bilayer is formed of two phospholipid layers which has hydrophobic tail and hydrophilic head.…

Q: In 2-3 sentences, summarize the spatial distribution of different types of structural lipids within…

A: Structure: A plasma membrane is a boundary that separates living cells from their non-living…

Q: Which of the following phospholipids islocalized to a greater extent in the outerleaflet of the…

A: (A) Choline phosphoglycerides are localized to a greater extent in the outer leaflet of the membrane…

Q: Ions cannot cross directly through a lipid bilayer, yet we know they travel in and out of cells.…

A: The cell membrane is a structure which protects the cell and acts as a barrier and transports the…

Q: 11. Which of the following phospholipids is localized to a greater extent in the outer leaflet of…

A: The distribution of phospholipids in the membrane lipid bilayer is asymmetric, meaning that certain…

Q: Which of the following schematics of cell membranes (i-iv) show the correct orientation of…

A: The cell membrane, also known as the plasma membrane, is found in all cells and serves to separate…

Q: What major type of molecule contributes to the formation of the cell membrane and what biochemical…

A: Cell membrane or plasma membrane is a fluid structure and forms the external boundary of cell. It…

Q: (a). Phospholipids are amphipathic molecules which have hydrophilic and hydrophobic regions. Explain…

A: Lipid Bilayer is the universal basis for the cell membrane. The bilayer structure is composed of…

Q: 4 Paramecium caudatum lives in a hypotonic solution. Excess water is removed from the cell via…

A: Vacuoles are cell organelles present mainly in Protists but are also present in higher organisms…

Q: Given lecithin, sphingomyelin, cephalin, phosphatidylcholine which of the following does not contain…

A: Lecithin is a fatty acid substance present in animal and plant tissues and amphiphilic in nature. It…

Q: A group of BS Biology students were tasked to design and fabricate different synthetic cell…

A: Membrane lipids are the group if compounds that construct the double layered surface of all cells…

Q: Match the following descriptions with the correct lipid-based compounds: v Cholesterol A. usually…

A: Lipids are not polymers. The simplest form of lipid is fatty acids which are a long chain of…

Q: Select all of the following which are normally found in higher concentrations inside the cell. PO4-…

A: From the following the normally concentration of k+ Potassium is higher inside the cell.    The…

Q: Statement 1: Peripheral Membrane Proteins are hydrophilic and are typically attached to the polar…

A: Hydrophilic means strong attraction towards water or attached to water.

Q: Why might adding a strong reducing agent like Dithiothreitol (DTT) help denature an extracellular…

A: Proteins are biopolymers made of repeating units of different amino acids. Protein structures play…

Q: For the lipids within the bilayer that comprise the plasma membrane: The hydrophilic ends face…

A: Structure of cell membraneLipid Bilayer-2 layers of phospholipidsPhosphate head is polar (water…

Q: What is Extracellular Matrix (ECM)? b) Connective tissue, cartilage and bone tissue, vessels,…

A: The basic framework of blood arteries is made up of extracellular matrix proteins. Matrix proteins…

Q: 1) Name TW0 types of molecule present in the plasma membrane. ii) Which of these would be destroyed…

A: a)  i) Plasma membrane : It is the outer covering of the cells . It is composed of two components…

Q: Dr. Bunsen Honeydew is interested in studying the lipid makeup of the cell membranes from a mammal…

A: The cell membrane also referred to as the plasma membrane comprises a  semipermeable lipid bilayer.…

Q: Which of the following molecules is more likely to diffuse through a synthetic lipid bilayer (i.e. a…

A: Part A. The protein backbone is the repetitive structure with nitrogen, alpha-carbon and carbon…

Q: What could be the reason why hydroxylation of proline residues is critical to the structural…

A: Collagen, is a fibrous protein that is the main structural component of the extracellular matrix in…

Q: Calcium is a mineral needed by the body to strengthen the bones and for muscular contraction. If the…

A: Calcium is very important for the functioning of our body. Our body needs calcium for making strong…

Q: What are the 3 main categories of membrane lipids.

A: “Since you have posted multiple questions, we will provide the solution only to the first question…

Q: b) Cellular membranes are generally found in environt diagram of what the phospholipid bilayer of a…

A: Life's functional units are cells. Cells are also the fundamental building blocks of life. A variety…

Q: Describe the macromolecular and biophysical characteristics of collagen in the extracellular matrix…

A: There are few points to know about collagen.  It is the major structural protein in the…

Q: Which of the following cell membrane lipids prefers to reside in the INNER leaflet (or inner half)…

A: The lipid bilayer is the biological membrane that consists of 2 layers of lipid molecules,…

Q: Fibroblasts are motile cells that “creep” about in the connective tissue of the body where they play…

A: Tiny fingers like projections, small folds present on the epithelial cell surface specifically small…

Q: Which one of the these primary protein structures is most likely to form an alpha helix that would…

A:

Q: Which of the following best describes collagen? Select the correct responses): It is a sinistral…

A: Collagen is a type of protein that is found in various tissues in the body, such as skin, bones,…

Q: A researcher is isolating proteins from a cell via different techniques. They find that when the…

A: Establishing protein expression is important in the study of cells, because proteins often carry out…

Q: You are studying the effects of temperature and lipid composition on membrane fluidity using…

A: The cell membrane, also known as the plasma membrane, is a thin, flexible barrier that surrounds the…

Q: Choose all that aplly that are TRUE for the lipid bilayer: Negative mark is given to incorrect…

A: A lipid bilayer is described as a very thin layer that is made up of two different layers of…

Q: From the list below, select the statements that are FALSE. (more than one) OThe hydropathy index…

A: The biochemical aspects of cells consist of many processes that are essential for life. So the study…

Q: List three molecules or types of molecules that can cross a lipid bilayer through simple diffusion.…

A: Plasma membrane : It is also known as cell membrane , found in all cells that separates the interior…

Q: Provide a detailed, written explanation of the plasma membrane structure explaining both composition…

A: Plasma membrane is the outer boundary of a cell that regulates the entry and exit of different…

Q: List the most likely cellular component or organelle that houses each of the following…

A: Proteins are high molecular weight polymers that serve diverse functional roles in cells. They…

Q: If you were tasked to make a very rigid lipid bilayer, which of the choices below would be the best…

A: Lipid bilayer is formed by two layers of lipid molecules arranged that consists of hydrophilic head…

Q: Why do they do not penetrate through the lipid bilayer?

A: The cell is the basic structural and functional unit of our body. It carries out many functions in…

Q: Snake venom contains the enzyme phospholipase A2, which cleaves the fatty acid at position 2 of a…

A: A phospholipid is an amphipathic molecule made up of four components fatty acids a phosphate  a…

Q: c) What part or parts of a cellular membrane play(s) a role in determining the fluidity of the…

A: Consists of a single phosphate head, and two fatty acid tails. All hydrophilic heads are on the…

Q: 2. (a) The diagram below shows the structure of a lipid. i. Which type of lipid does this structure…

A: Lipids are macromolecules containing hydrocarbons and are soluble in nonpolar solvents. Lipids…