BIOL 101Cell Membrane Quiz Score:100% Points: 80 out of 80 BIOL 101Cell Membrane Quiz Cell Membrane Quiz Schedule: After deadline.Ended 09/06/2019 11:59 PM EDT Attempt 1 of 2 Started:09/02/2019 12:03 PM EDT Submitted:09/02/2019 12:09 PM EDT Score:100% Points:80 out of 80 Question 1 Points: 10 out of 10 Which of the following can cross the cell’s plasma membrane without the assistance of protein transporters? Select all that apply. •             small hydrophobic molecules •             large polar molecules •             gasses •             positively charged ions Feedback Question 2 Points: 10 out of 10 Which substance would be most likely to pass through a lipid bilayer/plasma membrane without embedded proteins? •             a large fatty acid •             water •             a large peptide hormone •             a steroid hormone •             a sodium ion Feedback Question 3 Points: 10 out of 10 Which component of the plasma membrane has the widest variety of functions? •             proteins •             phospholipids •             sterols •             carbohydrates Feedback Question 4 Points: 10 out of 10 All of the following have an effect on the fluidity of a membrane except: •             the cholesterol content •             the ratio of saturated to unsaturated fatty acids •             the presence of integral proteins in the membrane •             interactions among fatty acids in the core of the bilayer Feedback Question 5 Points: 10 out of 10 A set of erythrocytes is placed in a beaker of 0.9% NaCl. Nothing appears to happen to the cells. Why? •             water has not moved at all. •             Sodium blocks the movement of water. •             0.9% NaCl is hypertonic to the cells. •             0.9% NaCl is iostonic to the cells. •             0.9% NaCl is hypotonic to the cells. Feedback Question 6 Points: 10 out of 10 What is the role of carbohydrates in the plasma membrane? •             cellular identification •             adhesion •             help maintain fluidity •             transport materials across the membrane Feedback Question 7 Points: 10 out of 10 Biological Membranes are: •             impermeable. •             static. •             dynamic. •             symmetrical. Feedback Question 8 Points: 10 out of 10 How does the selective permeability of the membrane help the cell. •             This allows the cell to maintain the proper shape. •             This allows the cell to regulate what enters and exits •             This allows the cell to maintain a constant temperature. •             All of these Feedback

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