Why do lipids form bilayer membranes rather than dissolve? Consider Thermodynamics and structural effects
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Why do lipids form bilayer membranes rather than dissolve? Consider
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- List the following compounds in order of increasing lipid bilayer permeability: RNA, Ca2+, glucose, ethanol, n2, water.Lipid bilayers form spontaneously in a process driven by the hydrophobic effect. Explain how the hydrophobic effect drives bilayer formation from individual lipids in an aqueous environment. Describe how the physical properties of the lipid bilayer are determined by the chemical properties of the membrane lipid components. Diagrams are encouraged for both parts of the question.Which of the following is true about phospholipid bilayers?
- 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.Explain why a phospholipid is both hydrophilic and hydrophobicA group of curious scientists were tasked to design various synthetic cell membranes that could be used to simulatecellular activities of different organisms. Help the researchers assemble the structure of the major lipid component for a cell membrane that is appropriate to study the following and briefly explain your answer. a) a prokaryotic cell thriving in a geyser at the Yellowstone National Park in Wyoming, USA b) a muscle cell of a salmon fry in the Arctic Ocean c) a frog neurocyte Please draw the structures clearly. Chemical structures of the compounds that are available are shown on the picture. HELPING TAGS: Biology, Chemistry, Biochemistry, Cell Biology, Molecular Biology
- Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the plasma membrane faces outward on the external surface of the cell, all the carbohydrate on internal membranes faces toward the cytosol.] [Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane.]Explain why entropy increases when a lipid bilayer forms from phospholipid molecules.Activity B: Molecules in Motion Brownian movement occurs when particles in a solution move because they are being struck by other particles in a solution. This was first discovered by Dr. Robert Brown in 1827 when he was observing pollen grains in water under a microscope. To observe this ourselves, we will look at carmine particles suspended in water under a microscope. a Brownian Motion Wetch later Share Watch on DYoulube Which statement best describes the movement of the particles? O The particles are dashing through the field of view. The particles are slightly vibrating. The particles are traveling in large circle patterns. O The particles are not moving at all.
- Name two glycerophospholipids found in eukaryotic cell membranes and two sphingolipids. What fraction of the lipid in most plasma membranes is cholesterol, and how does cholesterol content affect membrane fluidity? Note: be precise and go straight to the point. Adress what the question is asking you. I don't expect more than 5 sentences for an answer. I have experience with numerous tutors in the past with repect to the lenght of one response.Define the term phospholipids?describe the role of water in biological processes. Differentiate the hydrophilic and hydrophobic nature of biomaterials