Answered: Next Which of the following is true…

Chapter 15 Exercise 21 The Difference between Peripheral and Integral Proteins
Chapter 15 Exercise 21 The Difference between Peripheral and Integral Proteins

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Next Which of the following is true about integral proteins according to the fluid mosaic model? Integral proteins are embedded in the phospholipid bilayer. Integral proteins may attach to cholesterol. Integral proteins are free to leave the membrane. Integral proteins often undergo flip-flop movement.

Transcribed Image Text:Next Which of the following is true about integral proteins according to the fluid mosaic model? Integral proteins are embedded in the phospholipid bilayer. Integral proteins may attach to cholesterol. Integral proteins are free to leave the membrane. Integral proteins often undergo flip-flop movement.

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Cell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteins

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Figure 4.18 If a peripheral membrane protein were synthesized in the lumen (inside) of the ER, would it end up on the inside or outside of the plasma membrane?

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The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a. phosphate groups; hydrophobic b. fatty acid groups; hydrophilic c. phosphate groups; hydrophilic d. fatty acid groups; hydrophobic

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What happens if plasma membrane fails to maintain optimal fluidity?• Describe structure/function of lipid rafts

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What is the cause of the impermeability of plasma membranes to water-soluble molecules? Group of answer choices the nonpolar nature of water presence of phospholipid bilayer with a nonpolar/hydrophobic interior region presence of transmembrane proteins the presence of cellulose

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Which of the following is most likely NOT a function of Peripheral Proteins? support for membranes enzymes anchor for integral membrane proteins receptors

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Describe the permeability of cell membranes. How to substances cross cell membranes? Utilize the terms bi-polar, semi-permeable, diffusion, active transport, membrane proteins, endocytosis, exocytosis, vesicles, phagocytosis, pinocytosis, etc. (This should be 3-4 paragraphs long)

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Which of the following factors would tend to increase membrane fluidity? A greater proportion of unsaturated phospholipids A relatively high protein content in the membrane A greater proportion of saturated phospholipids A lower temperature

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Our current concept of the plasma membrane is called the fluidmosaic model. Why?

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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?

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Which of the following is false in regards to charged ions, non-lipid soluble proteins, and membranes? Charged ions are repelled by the lipid bilayer. Non-lipid soluble proteins are repelled by the lipid bilayer. Charged ions and non-lipid soluble proteins require other mechanisms to cross membranes. Charged ions and non-lipid soluble proteins do not require other mechanisms to cross membranes.

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Plasma cells are key to the immune response because they secrete antibodies. Given that antibodies are made of protein, which membrane enclosed cell organelle would you expect the plasma cells to have in abundance? Why?

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