Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 5, Problem 3TYK

The freeze-fracture technique demonstrated:

a. that the plasma membrane is a bilayer with individual proteins suspended in it.

b. that the plasma membrane is fluid.

c. that the arrangement of membrane lipids and proteins is symmetric.

d. that proteins are bound to the cytoplasmic side but not embedded in the lipid bilayer.

e. the direction of movement of solutes through the membrane.

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According to the fluid-mosaic model of the plasma membrane, a.protein and phospholipids form a regular, repeating structure. b.the membrane is a rigid structure. c.phospholipids form a double layer, with the polar parts facing each other. d.proteins are free to move within a double layer of phospholipids.
Which of the following describes the fluid mosaic model of the plasma membrane structure? a. The lipid bilayer is solid at body temperature, thus protecting the cell. b. The phospholipid bilayer is embedded with associated proteins, cholesterol and sugars and has a dynamic arrangement. c. The plasma membrane is composed of two layers of proteins embedded with lipids. d. Phospholipids consist of a polar head and a nonpolar tail made of three fatty acid chains
Provide 3 hypotheses about the fluidity and mosaicity of the cell membrane. Write the hypotheses in "IF-THEN" statement form. Example: If the detection tests result in a change of color, appearance, or pH value of the solution, then there is a movement of glucose, starch, NaCl, or H+ ions across the semi-permeable dialyzing membrane bag, and it is a good model.
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Biology: The Dynamic Science (MindTap Course List)
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