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Q: Identify the four types of proteins in a lipid bilayer
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Q: Which portion of a phospholipid is found in the middle (the interior) of a membrane?
A: The phospholipid bilayer consists of two adjacent sheets of phospholipids, arranged tail to tail.
Q: What would probably happen to the plasma membrane of a cell if it were composed of hydrophilic…
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A: What structure is usually found in the cell membrane is asked.
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Q: What is the basic structure of a biological membrane?
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Q: Which characteristic of a phospholipid contributes to the fluidity of the membrane?
A:
Q: what purpose does the plasma membrane’s hydrophobic interior serve?
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Q: Which of the following would never be found in the hydrophobic regions of the phospholipid bilayer?…
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Q: Which of the following most readily move through the cell membrane? Select one: O A. cholesterol O…
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Q: Identify the labeled parts of the plasma membrane below from the diagram. C A phospholipid…
A: A plasma membrane or cell membrane is a thin structure present both intracellularly and…
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: phospholipids regulate the flow of hydrophilic molecules? How does the bilayer layer regulate the…
A: PLASMA MEMBRANE:- It is also known as cell membrane or cytoplasmic membrane and this structure is…
Q: What is the energetic driving force for the formation of phospholipid bilayers?
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Q: What are the functional significance of the fluidity of a cell membrane?
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Q: Give an example of a phospholipid bilayer?
A: Lipids are macromolecules comprised of carbon, hydrogen, and oxygen just like carbohydrates but in…
Q: Which of these molecules has multiple partial charges and thus is most soluble in water? H H HHHH…
A: Most soluble in water.
Q: We have seen that biological membranes have both lipid and protein components. How do these two…
A: Biological membrane is a dynamic fluid structure and forms the external boundary of the cells. It…
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Q: “Plasma membrane is described as protein iceberg in sea of lipids”. why ?
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Q: . What kinds of molecules pass through a cell membrane most easily?
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Q: What is the main function of the phospholipid bilayer?
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Q: Define the term phospholipid bilayer?
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Q: Which of the following statements is (are) consistent with what is known about membranes? (a) A…
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Q: Which of the following statement best describes the chemical composition of cytoplasmic membrane?…
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Q: Why are plasma membranes arranged as a bilayer rather than a monolayer?
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A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
What molecules are found in animal cell membranes, but not in plant cell membranes? please explain.
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- Below is the skeletal formula of a molecule typically found in cell membranes. What type of molecule is this and how can you tell? What are the functions of this type of molecule in the plasma membrane of a cell? CH3 CH₂) (CH₂) 16 CH3 KoAmmonia (NH3) is a weak base that under acidic conditions becomes protonated to the ammonium ion in the following reaction: NH3 + H+ → NH+4 NH3 freely permeates biological membranes, including those of lysosomes. The lysosome is a subcellular organelle with a pH of about 4.5–5.0; the pH of cytoplasm is about 7.0. What is the effect on the pH of the fluid content of lyso- somes when cells are exposed to ammonia? Note: Ammo- nium (NH4+) does not diffuse freely across membranes.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.
- List the following compounds in order of increasing lipid bilayer permeability: RNA, Ca2+, glucose, ethanol, n2, water.In the figure below, an integral membrane protein is shown. These proteins sit inside of cell membranes. Some integral proteins are membrane channels or transporters, while others serve as enzymes, receptors, or anchors. Describe the differences you would expect to see in the amino acid side chains on the outer surface of an integral cell membrane protein, as compared to a water-soluble globular protein. Be sure to discuss the chemical nature of the cell membrane in your answer.A 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
- Eukaryotic cell membranes function as a hydrophobic barrier around the cell and prevent the passage of polar or charged molecules. Briefly explain how cell membranes work and use a simple diagram to aid your explanation. Refer specifically to hydrophobic and hydrophilic components in their structure.For the lipids within the bilayer that comprise the plasma membrane: O The hydrophilic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells, with hydrophobic ends buried in the center of the lipid bilayer. The hydrophobic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells, with hydrophilic ends buried in the center of the lipid bilayer. The hydrophilic ends face the outside (extracellular/exoplasmic face) of the cells and the hydrophobic ends face inside (cytoplasmic face) of the cells. O Hydrophobic and hydrophilic ends face outside (extracellular/exoplasmic face) and inside (cytoplasmic face) of the cells randomly. The hydrophobic ends face the outside (extracellular/exoplasmic face) of the cells, the hydrophilic ends face inside (cytoplasmic face) of the cells.Name: b) Cellular membranes are generally found in environments that contain lots of water. Draw a diagram of what the phospholipid bilayer of a plasma membrane would look like if it were placed in a hydrophobic environment. (**Note that you only have to draw the phospholipid bilayer, you don't have to draw the other major components again as you did in part a) c) What part or parts of a cellular membrane play(s) a role in determining the fluidity of the membrane? 8) Indicate which of the five major types of membrane protein (adhesion, enzymatic, recogniti receptor, and transport) is most likely to be involved in each of the situations described below: a) An oncologist wants to study the cells from a certain tumour that has been surgically remov from a patient. However, she must first treat the tumour with a solution affects a membrane protein on the tumour cells. Because of the effect of the solution on the membrane protein, the tumour tissue falls apart into individual cells. Type of…
- Draw the basic structure of a lipid bilayer and label thehydrophilic and hydrophobic regions. Why is the cytoplasmicmembrane a good permeability barrier?Explain why charged molecules pass more easily through biological membranes than through a pure lipid bilayer.The compositions of the inner and outer surfaces of the lipid bilayer are different. Why do these differences exist and how might they be of use to a living cell?