MASTERING BIO CHAPTER 3 LIPIDS (Part 1) – Flashcards
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Which of these is NOT a lipid?
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RNA
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saturated fat
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This figure is an example of a(n) _____.
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Which of these is rich in unsaturated fats?
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olive oil
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A function of cholesterol that does not harm health is its role _____.
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as a component of animal cell membranes
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Which statement most accurately explains why cholesterol and phospholipids are amphipathic but fats are not?
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Cholesterol and phospholipids contain both hydrophilic and hydrophobic regions; fats are primarily hydrophobic.
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Steroids are considered to be lipids because they _____.
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are not soluble in water
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Molecules that are amphipathic must contain _____.
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both hydrophilic and hydrophobic regions
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Lipids are insoluble in water because_____.
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they contain nonpolar C-C and C-H bonds
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Which of the following is true of membrane lipids?
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They contain a hydrophilic head group and a hydrophobic tail.
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The presence of many C-C and C-H bonds causes fats to be ...
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(a) rich in energy.
(b) insoluble in water.
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In fat synthesis,________and fatty acids combine to make fats plus________.
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glycerol; water
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In the reaction that builds a fat,________ groups react with ________ groups.
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hydroxyl; carboxyl
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Triglycerides vary with respect to the number of ...
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(b) C atoms in the tails.
(c) double bonds in the tails.
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A food company hydrogenated a barrel of fat. The treatment ...
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made the fat less fluid.
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The most unsaturated fats have ...
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the most double bonds.
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What do DNA, proteins, and fats have in common?
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They contain carbonyl groups.
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What does cholesterol have in common with sex hormones?
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Four linked rings.
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For good health, you don't want your body to run the LDL part of this diagram faster than the HDL part because ...
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LDL cholesterol is stored; HDL cholesterol is destroyed.
