12. Why do phospholipids place in water spontaneously form bilayers? (Multiple Choice) a) The "heads" of the phospholipids engage in hydrophobic interactions with the water molecules. b) The fatty acid "tails" engage in hydrogen bonding with the water molecules. c) Each of the molecules has a polar and non-polar region. d) The water molecules cannot interact with phospholipids since each has a different polarity. e) Lipid bilayers are required for the attachment of peripheral proteins.
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Step 1: Phospholipids are composed of a polar head (phosphate group) and a non-polar fatty acid tail. Show more…
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Why do phospholipids form bilayers in water? A) because they are amphipathic molecules (polar and hydrophobic regions on the same molecules) and bilayers allow each region to interact with its preferred environment B) because phospholipids are polar molecules and therefore soluble in water C) none of these answers is correct D) because phospholipids are hydrophobic molecules and therefore are insoluble in water
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Why do phospholipids tend to spontaneously orient themselves into something resembling a membrane? a. Phospholipids are amphipathic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails. b. Phospholipids are lipophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails c. Phospholipids are amphipathic molecules. The nonpolar head faces towards other fatty acid tails and the polar fatty acid tails face towards water. d. Phospholipids are hydrophilic molecules. The polar head faces towards water and the nonpolar fatty acid tails face towards other fatty acid tails.
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Which statement about membrane phospholipids is $n o t$ true? a. They associate to form bilayers. b. They have hydrophobic "tails." c. They have hydrophilic "heads." d. They give the membrane fluidity. $e .$ They flop readily from one side of the membrane to the other.
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