What determines the fluidity of the biomembranes? Stiffness and rigidity of biomembranes depends on what? Explain why biomembranes are considered as fluid mosaic structures.
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- What determines the fluidity of the biomembranes?
- Stiffness and rigidity of biomembranes depends on what?
- Explain why biomembranes are considered as fluid mosaic structures.
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- 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?Below are listed molecules with different chemical characteristics. Knowing that all molecules will eventually diffuse across a phospholipid bilayer, select the list that most accurately predicts the relative rates of diffusion of these molecules (fastest to slowest) across a biological membrane. alanine, propanol, sodium, estrogen sodium, propanol, alanine, estrogen estrogen, propanol, sodium, alanine estrogen, propanol, alanine, sodiumBiological membranes are often described using the fluid mosaic model. What are three defining characteristics of this model.
- According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids? They frequently flip-flop from one side of the membrane to the other. They have hydrophilic tails in the interior of the membrane. They can move laterally along the plane of the membrane. They are free to depart from the membrane and dissolve in the surrounding solution.Describe the chemical composition of membranes. What are the two most critical functions of membranes? What contributes to membrane fluidity and rigidity? Explain Diffusion. What are the differences between Osmosis and Dialysis? Explain the differences between Iso, Hypo, and Hypertonic conditions. If the solutions is Hypertonic then the cell would be?Which of the following provides the most accurate description so far of a cell membrane? The cell membrane is composed of a pure lipid bilayer that is covered entirely by proteins. The cell membrane is composed purely of a lipid bilayer that formed from lipid molecules that have aggregated. The cell membrane is composed of a lipid bilayer with membrane proteins moving freely in the lipid bilayer. O The cell membrane is composed of globular proteins that are covered by the lipid bilayer.
- Explain the following statement: The structure of all biomembranes depends on the chemical properties of phospholipids, whereas the function of each specific biomembrane depends on the specific proteins associated with that membrane.Which of the following best describes a biological membrane? two layers of phospholipids with proteins embedded between the two layers two layers of phospholipids (with opposite orientations of the phospholipids in each layer) with each layer covered on the outside with proteins two layers of phospholipids with proteins either spanning the layers or on the surface of the layers a fluid structure in which phospholipids and proteins move freely between sides of the membrane a mixture of covalently linked phospholipids and proteins that determines which solutes can cross the membrane and which cannotselect the false statement regarding phospholipid bilayer membranes. phospholipid bilayer part of the biological membrane has to be highly fluid to support its biological function. One of the forces driving phospholipid aggregation are Vender Waals interaction. Aggregation of phospholipid molecules is favored by higher entropy of water molecules in the aggregated state. Fluidity of phospholipid membranes is lower with higher content of unsaturated fatty acids. Phospholipid membrane containing unnatural trans unsaturated fatty acid are more rigid.
- The phospholipid portion of biological membranes is referred to as "selectively permeable". What does this term mean? What types of substances can cross the phospholipid bilayer? What types cannot?Which of the following statement best describes the chemical composition of cytoplasmic membrane? Cytoplasmic membrane is bilayer of phospholipids embedded with proteins Cytoplasmic membrane is composed of two layers- one layer of phospholipids and one layer of proteins. Cytoplasmic membrane is bilayer of proteins embedded with phospholipidsExplain the fluid mosaic model of the cell membranes. Which component of cell membrane is responsible for its fluidity.
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