Cell Biology Quiz
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MEMBRANES AND TRANSPORT
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A membrane patch contains three distinct regions with different cholesterol concentrations: Region 1 has 10% cholesterol, Region 2 has 30% cholesterol, and Region 3 has 50% cholesterol. All regions have identical phospholipid compositions (60% PC, 40% PE). When subjected to mechanical stress, Region 3 shows the highest resistance to rupture, while Region 1 ruptures at the lowest applied force. Which fluid mosaic model principle explains the relationship between cholesterol content and mechanical stability?
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