Chapter 11 Practice Quiz

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Chapter 11 Practice Quiz Lipid molecules are said to be amphipathic, meaning that A. they have asymmetric carbons and can exist in left- and right-handed forms. B. they have a dual nature with part of the molecule being hydrophobic and the other part hydrophilic. C. they are capable of moving rapidly from one side of a lipid bilayer to the other. D. they carry a positive charge on one end and a negative charge on the other end. B Unsaturated fatty acids have double bonds that are in the cis, rather than the trans, configuration. One of the consequences of this is... A. an alteration in the charge of the molecule. B. an alteration in the number of carbons in the molecule. C. a bend in the molecule. D. an enhanced flexibility of the molecule. C In phosphoglycerides, fatty acids are esterified at... A. glycerol carbons 1 and 2. B. glycerol carbons 1 and 3. C. any two of the three glycerol. D. a glycerol carbon and the phosphate group. A Which of the following is NOT a difference of archaeal membrane lipids relative to those of other organisms? A. A backbone other than glycerol is used. B. Fatty acid esters are replaced with long chain alcohol esters to the glycerol. C. The long hydrophobic tails are branched rather than being linear. D. Ether linkages instead of ester linkages are used. A

Of the three major types of membrane lipids, which is NOT found in prokaryotes? A. phospholipids B. glycolipids C. cholesterol D. phosphoglycerides C See an expert-written answer The fatty acid oleate contains 18 carbons and a cis double-bound after carbon number nine. Which of the following would be a correct designation for this molecule? A. 18:9 B. 9:18 C. 18:1 D. 0:18 C Fatty acids in biological systems usually contain an even number of carbon atoms. Which of the following are the MOST common? A. fatty acids with 16 and 18 carbons B. fatty acids with 18 and 20 carbons C. fatty acids with 14 and 16 carbons D. fatty acids with 12 and 14 carbons A Triacylglycerol consists of fatty acids attached to: A. three cholesterols. B. one glycerol phosphate. C. two glycerol phosphates. D. one glycerol. D The three major kinds of membrane lipids are:

A. phospholipids, fatty acids, and glycolipids. B. phospholipids, fatty acids, and cholesterol. C. phosphatidylinositol, phosphatidylcholine, and phosphatidylethanolamine. D. phospholipids, glycolipids, and cholesterol. D What is the MOST common steroid? A. cholesterol B. testosterone C. estradiol D. NADPH A https://quizlet.com/391946867/ch-11-lipids-quiz-flash-cards/ https://quizlet.com/48814984/biochem-ch-11-textbook-online-quiz-qs-lipids-flash-cards/

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