Biology > EXAM > CHAPTER 11 MEMBRANE STRUCTURE Southern Methodist University - BIOL 3350chap 11 (All)

CHAPTER 11 MEMBRANE STRUCTURE Southern Methodist University - BIOL 3350chap 11

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CHAPTER 11 MEMBRANE STRUCTURE  2004 Garland Science Publishing The Lipid Bilayer 11-1 For each of the following sentences, fill in the blanks with the best word or phrase selected from the lis... t below. Not all words or phrases will be used; each word or phrase should be used only once. The specialized functions of different membranes are largely determined by the __________________ they contain. Membrane lipids are __________________ molecules, composed of a hydrophilic portion and a hydrophobic portion. All cell membranes have the same __________________ structure, with the __________________ of the phospholipids facing into the interior of the membrane and the __________________ on the outside. The most common lipids in most cell membranes are the __________________. The head group of a glycolipid is composed of __________________. amphipathic hydrophobic phosphatidylserine cholesterol lipid bilayer phospholipids fatty acid tails lipid monolayer proteins glycolipids lipids sterols hydrophilic head groups phosphatidylcholine sugars 11-2 Which of the following membrane lipids does not contain a fatty acid tail? (a) Phosphatidylcholine (b) A glycolipid (c) Phosphatidylserine (d) Sphingomyelin (e) Cholesterol 11-3 Which of the following statements regarding lipid membranes is TRUE? (a) Phospholipids will spontaneously form liposomes in nonpolar solvents. (b) In eucaryotes, all membrane-enclosed organelles are surrounded by one lipid bilayer. (c) Membrane lipids diffuse within the plane of the membrane. (d) Membrane lipids frequently flip-flop between one monolayer and the other. (e) The preferred form of a lipid bilayer in water is a flat sheet with exposed edges. [Show More]

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