202003sample - BIOL 2020 Sample Multiple BIOL 2020 Exam#3...

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1) What kinds of molecules pass through a cell membrane most easily? A) ionic B) large polar C) small and hydrophobic D) monosaccharides such as glucose E) large and hydrophobic 2) All of the following processes take material into cells except A) endocytosis. B) osmosis. C) exocytosis. D) facilitated diffusion. E) active transport. 3) According to the fluid mosaic model of cell membranes, which of the following is a true statement about membrane phospholipids? A) They have hydrophilic tails in the interior of the membrane. B) They occur in an uninterrupted bilayer, with membrane proteins restricted to the surface of the membrane. C) They are free to depart from the membrane and dissolve in the surrounding solution. D) They frequently flip-flop from one side of the membrane to the other. E) They can move laterally along the plane of the membrane. 4) Which of the following statements regarding lipid membranes is TRUE? A) Membrane lipids frequently flip-flop between one monolayer and the other. B) In eucaryotes, all membrane-enclosed organelles are surrounded by one lipid bilayer. C) Phospholipids will spontaneously form liposomes in nonpolar solvents. D) Membrane lipids diffuse within the plane of the membrane. E) The preferred form of a lipid bilayer in water is a flat sheet with exposed edges. 5) The presence of cholesterol in the plasma membranes of some animals A) makes the animal more susceptible to circulatory disorders. B) enables the membrane to stay fluid more easily when cell temperature drops. C) enables the animal to add hydrogen atoms to unsaturated phospholipids. D) makes the membrane less flexible, allowing it to sustain greater pressure from within the cell. E) enables the animal to remove hydrogen atoms from saturated phospholipids. 1 BIOL 2020 Sample Multiple Choice Questions Exam #3
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6) You have a friend who lost about 15 pounds of fat on a "low carb" diet. How did the fat leave his body? A) It was converted to ATP, which weighs much less than fat. B) Chemical energy was converted to heat and then released. C) It was converted to urine and eliminated from the body. D) It was broken down to amino acids and eliminated from the body.
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202003sample - BIOL 2020 Sample Multiple BIOL 2020 Exam#3...

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