Although both faces of a biomembrane are composed of the same general types of macromolecules, principally lipids and proteins, the two faces of the bilayer are not identical. What accounts for the asymmetry between the two faces?

Q: Why is the intermembrane space acidic?

A: The mitochondria are the organelle present in the cytoplasm but not in the nucleus. It is mainly…

Q: Which of the following would you expect to be freely permeable through a pure lipid bilayer?…

A: lipid bilayer is a thin polar membrane that is made of two layers of lipid molecules. Lipid…

Q: What is meant by isotonic, hypotonic, and hypertonic in terms of a solution surrounding a cell…

A: A hypotonic solution is any solution that has a lower osmotic pressure than another solution. If the…

Q: The compositions of the inner and outer surfaces of the lipid bilayer are different. Why do these…

A: The lipid bilayer or phospholipid bilayer is a thin polar membrane made up of two layers of lipid…

Q: Identify the four types of proteins in a lipid bilayer

A: Lipid bilayer is a thin polar membrane that forms a continuous barrier around a cell. It is made up…

Q: Define lipid bilayer

A: Lipids are the major constituent of the plasma membrane. These are composed of fatty acids and…

Q: Differentiate between materials that can and cannot diffuse through the lipid bilayer

A: Water-soluble materials do not diffuse through lipid bilayer while lipid-soluble materials diffuse…

Q: Describe the lipid bilayer structure of a cell membrane. What are the roles of proteins in membrane…

A: Plasma membrane is the outer boundary of the cell. It is selective permeable in nature that is it…

Q: Which of the following is true about phospholipid bilayers? a. The hydrophobic head faces the cell…

A: The phospholipid bilayer consists of two layers of phospholipids, with a hydrophobic, or…

Q: Which of the following statements about the membrane bilayer is FALSE?

A: Introduction: Lipids are the constituents of membrane structure and regulate the membrane…

Q: How many phospholipid molecules are there in a 1-μm region of a phospholipid bilayer membrane?…

A: In phospholipid- glycerol, two tails made of fatty acids, and a head group linked with phosphate…

Q: Which intermolecular process primarily drives the formation of a bilayer when phospholipids are…

A: Phospholipids are the chief constituent of the plasma membrane. They are amphiphilic and can form…

Q: Why do the hydrocarbon tails of membrane phospholipids provide a barrier between the inside and…

A: The membranes of a typical cell are composed of phospholipids. The phospholipids are composed of a…

Q: Compare the hydrophobic forces that hold a membrane protein in the lipid bilayer with those that…

A: lipid Bilayer --Lipid bilayer is fundamental part of all cellular membrane .Each phospholipid…

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

A:

Q: Explain the following statement: The structure of all biomembranes depends on the chemical…

A: Introduction:  The biological membrane is made of phospholipids. These phospholipids are arranged in…

Q: According to the fluid mosaic model of membrane structure,proteins of the membrane are mostly(A)…

A: Lipid bilayer provides the basic structure of the cell membrane proteins and performs most of the…

Q: Why don’t proteins turn around in biological membraneslike revolving doors?

A: Membranes : It is the thin layer that forms the outer boundary of a living cell or of an internal…

Q: Which of the following correctly describes the structure of the phospholipid bilayer in plasma…

A: The plasma membrane is mostly made of phospholipids, which are fatty acids and alcohol. The…

Q: Consider a globular protein embedded in a lipid bilayer. Which of the following amino acid residues…

A: NOTE: Since you have asked multiple question, we will solve the first question for you. If you want…

Q: Explain why phospholipids have a natural tendency to self-assemble into a bilayer. Why is this…

A: Phospholipids are cylindrical in structure with hydrophilic and hydrophobic ends.

Q: What is the molecule among the most important molecules of the cell because they are in the…

A: Biological membranes are defined as the thin,transparent and semipermeable membranes present in both…

Q: the properties of lipids responsible for the property of bilayers?

A: Note - we answer one question at a time. The plasma membrane is also known as the cell membrane.…

Q: What is the phospholipid bilayer made of?

A: The plasma membrane is a microscopic biological membrane, made up of lipids and proteins that…

Q: Would substances be able to pass through the plasma membrane if the phospholipid tails of the plasma…

A: Transport of molecules become difficult across plasma membrane if the phospholipid tails of plasma…

Q: what purpose does the plasma membrane’s hydrophobic interior serve?

A: Introduction The plasma membrane, also known as the cell membrane, is the membrane found in all…

Q: Part a) Would a single alpha helix be more stable in a aqueous solution or a membrane. Explain why.…

A: The secondary structure of proteins is referred to as the regular, recurring arrangements of…

Q: How can water, oxygen, and carbon dioxide move freely through the phospholipid bilayer, but larger…

A: To answer this question first we must know a little bit about the structure of the plasma membrane.…

Q: Why is the cell membrane called a phospholipid bilayer?

A: The cell membrane is thin, elastic, flexible covering that holds the cellular contents. It is also…

Q: What drives the movement of lipid molecules and proteins within the bilayer? How can such movement…

A: The cell membrane is an important part of a cell as it determines the structure and function of the…

Q: Cellular membranes are self-sealing—if they are punctured or disrupted mechanically, they quickly…

A: The cell membrane is a thin layer that surrounds the cell and separates the interior of the cell…

Q: Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the…

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

Q: For plasma membrane, what macromolecules (carbohydrates, proteins, lipids, or necleic acids…

A: Plasma membrane (cell membrane) : It is made up of double layer of phospholipids. Hence it is lipid…

Q: How does the composition of the bilayer affect its properties?

A: The lipid bilayer (Phospholipid bilayer) is a thin polar membrane made of two layers of lipid…

Q: How does a phospholipid bilayer droplet with an aqueous center differ from a cell

A: Lipids are water insoluble molecules cause they contain fatty acids whose major portion is…

Q: What are the functional significance of the fluidity of a cell membrane?

A: Cell membrane is also known as plasma membrane or cytoplasmic membrane.  It is a biological membrane…

Q: Which diagram below represents the transmembrane protein whose membrane topology is shown on the…

A: The transmembrane proteins are present in the cell membrane. These are embedded in the membrane and…

Q: Why is the lipid bilayer of a c

A: The cell membrane is the shape-maintaining component of the cell. It is present in both animal and…

Q: What determines the fluidity of the biomembranes? Stiffness and rigidity of biomembranes depends on…

A: Biological membranes are the chemical composition of phospholipid bilayer with peripheral and…

Q: Biological membranes are critical components of cells that allow compartmentalisation of cellular…

A: The diagram shows a schematic outline of a G protein coupled receptor or Seven Pass Receptor (since…

Q: Most cytoplasmic proteins lack disulfide bonds, whereas extracellular proteins usually contain them.…

A: Disulfide bond formation generally occurs in the endoplasmic reticulum by oxidation.

Q: Which would be a property of all the major types of lipids in this membrane? * They would have polar…

A: Membrane lipids Proteins and carbohydrates can be connected or covalently bonded to a lipid bilayer…

Q: Describe two types of association between proteins and membranes.

A: Introduction:- While membrane lipids provide the basic structure of the lipid bilayer, proteins are…

Q: What is the chemical composition of the lipid part of the cell membrane? What is the most common…

A: The plasma membrane defines the borders of the cell. It allows the cell to interact with its…

Q: Which of the following types of molecules can never move across the phospholipid bilayer of a cell…

A: Fluid mosaic model proposed by singer and Nicholson in 1972 says that the cell membrane structure…

Q: Which of the following choice/s will best complete the statement below: For bilayers that have a…

A: Saturated fat have all single bonds. Unsaturated fat have double bonds.

Q: How do proteins and the lipid bilayer interact with each other in membranes?

A: Introduction: Those lipids that are both hydrophilic and hydrophobic in nature are known as…

Q: Which portion of the phosphatidylinositol molecule contributes to (a) fluidity of the bilayer and…

A: Phosphatidylinositol is a type of glycerophospholipid that contains a glycerol backbone, two…

Osmosis

In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has to be semipermeable. The liquid in the region with a lower solute concentration moves to the region with a higher concentration, thereby displacing the solution in the process. The objective is to equalize the concentration of molecules on both sides of the membrane; the displacement of liquid can be viewed as a byproduct of this equalization. Since there is no energy required to carry osmosis, it is considered a passive process.