Chapter 7: Membrane Structure and Function

What statement about a typical plasma membrane is correct?
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If a red blood cell is placed in a salt solution and bursts, what is the tonicity of the solution relative to the interior of the cell?HypotonicThe solutions in the two arms of this U-tube are separated by a membrane that is permeable to water and glucose but not to sucrose. Side A is half-filled with a solution of 2 M sucrose and 1 M glucose. Side B is half-filled with 1 M sucrose and 2 M glucose. Initially, the liquid levels on both sides are equal.IsotonicA patient was involved a serious accident and lost a large quantity of blood. In an attempt to replenish body fluids, distilled water-equal to the volume of blood lost-is added to the blood directly via one of his veins. What will be the most probable result of this transfusion?The patient's red blood cells will swell and possibly burst because the blood has become hypotonic compared to the cells.For a protein to be an integral membrane protein, it would have to be _____.amphipathic, with at least one hydrophobic regionWhy are lipids and proteins free to move laterally in membranes?There are only weak hydrophobic interactions in the interior of the membrane.Which of the following is a characteristic feature of a carrier protein in a plasma membrane?It exhibits a specificity for a particular type of molecule.What kinds of molecules pass through a cell membrane most easily?small and hydrophobicWhen a cell is in equilibrium with its environment, which of the following occurs for substances that can diffuse through the cell?There is random movement of substances into and out of the cell.Active and passive transport of solutes across a membrane typically differ in which of the following ways?Active transport always involves the utilization of cellular energy, whereas passive transport does not require cellular energy.