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3. You have a protein that is easily extracted from a cell membrane preparation, without any associated lipids, by washing with a buffer containing a salt (e.g. 2M NaBr) without the need to treat the membrane with detergents. What type of protein do you have? E) Peripheral (extrinsic) F) A protein covalently anchored to membrane fatty acids G) Transmembrane H) None of the above Answer: Explanation: 4. A bacterium is suddenly expelled from a warm human intestine into the cold world outside (hey, it's been a cold December!). Which of the following adjustments might the bacterium make to maintain the same level of membrane fluidity? 1) Produce lipids with hydrocarbon tails that are longer and have fewer double bonds J) Produce lipids with hydrocarbon tails that are shorter and have more double bonds K) Decrease the amount of cholesterol in the membrane L) Decrease the amount of glycolipids in the membrane Answer: Explanation: 5. Which of the following membrane lipids does not contain fatty acid tails? Explain what the biochemical nature of such lipid is. M) Phosphatidylcholine N) A glycolipid O) o) Phosphatidylserine P) Cholesterol Answer: Explanation: 6. Cholesterol serves several essential functions in mammalian cells. Which of the following properties of the membrane is not influenced by cholesterol? Q) Thickness R) Rigidity s) Fluidity T) Permeability Answer: Explanation:

3. You have a protein that is easily extracted from a cell membrane preparation, without any associated lipids, by washing with a buffer containing a salt (e.g. 2M NaBr) without the need to treat the membrane with detergents. What type of protein do you have? E) Peripheral (extrinsic) F) A protein covalently anchored to membrane fatty acids G) Transmembrane H) None of the above Answer: Explanation: 4. A bacterium is suddenly expelled from a warm human intestine into the cold world outside (hey, it's been a cold December!). Which of the following adjustments might the bacterium make to maintain the same level of membrane fluidity? 1) Produce lipids with hydrocarbon tails that are longer and have fewer double bonds J) Produce lipids with hydrocarbon tails that are shorter and have more double bonds K) Decrease the amount of cholesterol in the membrane L) Decrease the amount of glycolipids in the membrane Answer: Explanation: 5. Which of the following membrane lipids does not contain fatty acid tails? Explain what the biochemical nature of such lipid is. M) Phosphatidylcholine N) A glycolipid O) o) Phosphatidylserine P) Cholesterol Answer: Explanation: 6. Cholesterol serves several essential functions in mammalian cells. Which of the following properties of the membrane is not influenced by cholesterol? Q) Thickness R) Rigidity s) Fluidity T) Permeability Answer: Explanation:

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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3. You have a protein that is easily extracted from a cell membrane preparation, without any associated lipids, by washing with a buffer containing a salt (e.g. 2M NaBr) without the need to treat the membrane with detergents. What type of protein do you have? E) Peripheral (extrinsic) F) A protein covalently anchored to membrane fatty acids G) Transmembrane H) None of the above Answer: Explanation: 4. A bacterium is suddenly expelled from a warm human intestine into the cold world outside (hey, it's been a cold December!). Which of the following adjustments might the bacterium make to maintain the same level of membrane fluidity? I) Produce lipids with hydrocarbon tails that are longer and have fewer double bonds Produce lipids with hydrocarbon tails that are shorter and have more double bonds K) Decrease the amount of cholesterol in the membrane L)Decrease the amount of glycolipids in the membrane Answer: Explanation: 5. Which of the following membrane lipids does not contain fatty acid tails? Explain what the biochemical nature of such lipid is. M) Phosphatidylcholine N) A glycolipid o) Phosphatidylserine P) Cholesterol Answer: Explanation: 6. Cholesterol serves several essential functions in mammalian cells. Which of the following properties of the membrane is not influenced by cholesterol? Q) Thickness R) Rigidity s) Fluidity T) Permeability Answer: Explanation:
Transcribed Image Text:3. You have a protein that is easily extracted from a cell membrane preparation, without any associated lipids, by washing with a buffer containing a salt (e.g. 2M NaBr) without the need to treat the membrane with detergents. What type of protein do you have? E) Peripheral (extrinsic) F) A protein covalently anchored to membrane fatty acids G) Transmembrane H) None of the above Answer: Explanation: 4. A bacterium is suddenly expelled from a warm human intestine into the cold world outside (hey, it's been a cold December!). Which of the following adjustments might the bacterium make to maintain the same level of membrane fluidity? I) Produce lipids with hydrocarbon tails that are longer and have fewer double bonds Produce lipids with hydrocarbon tails that are shorter and have more double bonds K) Decrease the amount of cholesterol in the membrane L)Decrease the amount of glycolipids in the membrane Answer: Explanation: 5. Which of the following membrane lipids does not contain fatty acid tails? Explain what the biochemical nature of such lipid is. M) Phosphatidylcholine N) A glycolipid o) Phosphatidylserine P) Cholesterol Answer: Explanation: 6. Cholesterol serves several essential functions in mammalian cells. Which of the following properties of the membrane is not influenced by cholesterol? Q) Thickness R) Rigidity s) Fluidity T) Permeability Answer: Explanation:
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