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Chemistry

Q: According to the fluid-mosaic model of a cell membrane, the main component of a membrane is A) a lipid bilayer. B) a membrane protein. C) a glycoprotein. D) a steroid. E) a prostaglandin.
Q: Channel proteins in cell membranes serve what function? A) They add strength and rigidity to the membrane. B) They provide pathways for water and electrolytes to move through cell membranes. C) They form the bilayer portion of the membrane. D) They allow nonpolar substances to move through the membrane. E) They prevent interactions between the nonpolar tails of the phospholipids which gives the membrane its fluidity.
Q: In the fluid-mosaic model that describes plasma membranes, A) there are three layers of glycerophospholipid molecules. B) two layers of glycerophospholipid molecules have their nonpolar sections oriented to the inside of the membrane. C) two layers of glycerophospholipid molecules have their nonpolar sections along the outer surface of the membrane. D) A single row of glycerophospholipid molecules forms a barrier between the inside and outside of the cell. E) two layers of proteins separate the contents inside a cell from the surrounding fluids.
Q: The main lipid components in cellular membranes are A) glycerolphospholipids. B) terpenes. C) steroids. D) triacylglycerols. E) waxes.
Q: Which of the following is a lipid? A) cholesterol B) nicotine C) aniline D) lactose E) collagen
Q: The steroid hormone present in birth control pills is A) aldosterone. B) progesterone. C) cortisone. D) estrogen. E) norethindrone.
Q: The steroid hormone that increases the blood glucose and glycogen levels from fatty acids and amino acids is A) aldosterone. B) progesterone. C) cortisone. D) estrogen. E) prednisone.
Q: Which of the following is NOT a lipoprotein that carries nonpolar lipids through the bloodstream? A) sphingosine B) LDL C) HDL D) VLDL E) chylomicron
Q: Synthesis of cholesterol and bile salts takes place in the A) liver. B) gall bladder. C) small intestine. D) large intestine. E) pancreas.
Q: A lipoprotein particle functions to A) dissolve polar lipids for excretion. B) metabolize lipids into new substances. C) dissolve polar lipids in urine. D) transport nonpolar lipids to body cells. E) store lipids in the tissues.
Q: The most common type of gallstones is composed of almost pure A) cholesterol. B) bile salts. C) glycerophospholipids. D) calcium salts of fatty acids. E) anabolic steroids.
Q: A lecithin contains which of the following components? A) glycerol and three fatty acids B) glycerol, two fatty acids and choline C) glycerol, two fatty acids, phosphate and an amino alcohol D) sphingosine, two fatty acids, phosphate and an amino alcohol E) sphingosine, one fatty acid, phosphate and an amino alcohol
Q: Which of the following is NOT a function of glycerophospholipids? A) transport of triacylglycerols B) regulation of cellular permeability C) protect nerve cells D) aid in digestion E) transport of cholesterol
Q: Which of the following compounds is a glycerolphospholipid? A) jojoba wax B) estrogen C) lecithin D) triolein E) cerebroside
Q: What phospholipid contains fatty acids but NOT glycerol? A) lecithin B) glycolipid C) sphingolipid D) cephalin E) corticosteroid
Q: In the list below, which lipid type is most soluble in water? A) triacylglycerols B) glycerophospholipids C) oils D) steroids E) waxes
Q: The components in the following glycerophospholipid are A) sphingosine, palmitic acid, phosphate, and choline. B) sphingosine, palmitic acid, phosphate, and serine. C) glycerol, palmitic acid, phosphate, and ethanolamine. D) glycerol, palmitic acid, phosphate, and galactose. E) sphingosine, palmitic acid, phosphate, and ethanolamine.
Q: Glycerophospholipids can interact both with other lipids and water because they contain both ________ and ________. A) single bonds; double bonds B) polar regions; nonpolar regions C) glycerol; sphingosine D) saturated fatty acids; unsaturated fatty acids E) bile salts; cholesterol
Q: The products of this reaction is A) glyceryl trioleate B) glyceryl trisrearate C) glyceryl tripalmitate D) fat. E) glyceryl tricaprate.
Q: The products of the saponification of a fat are A) the esters of fatty acids. B) fatty acids and glycerol. C) salts of fatty acids. D) salts of fatty acids and glycerol. E) phospholipids.
Q: The products of the acid catalyzed hydrolysis of a fat are A) the esters of fatty acids. B) fatty acids and glycerol. C) salts of fatty acids. D) salts of fatty acids and glycerol. E) phospholipids.
Q: Palmitic acid is a 16 carbon acid. In a balanced equation, the products of the saponification of glyceryl tripalmitate (tripalmitin) are
Q: Margarine containing partially hydrogenated soybean oil is solid because A) it contains only saturated fats. B) it contains only trans fatty acids. C) some of its double bonds have been converted to single bonds. D) it contains only cis double bonds. E) it contains only polyunsaturated fatty acids.
Q: Commercially, liquid vegetable oils are converted to solid fats such as margarine by A) hydrogenation. B) hydrolysis. C) hydration. D) oxidation. E) saponification.
Q: Which of the following is a polyunsaturated fat? A) triolein B) tripalmitin C) tristearin D) trimyristin E) trilinolein
Q: A triacylglycerol that is solid at room temperature is called a(n) A) cephalin. B) lecithin. C) oil. D) wax. E) fat.
Q: Waxes are lipids derived from A) a long-chain alcohol and a long-chain fatty acid. B) glycerol and three fatty acids. C) glycerol, fatty acids, phosphate, and an amino alcohol. D) sphingosine, fatty acids, phosphate, and an amino alcohol. E) terpenes and steroids.
Q: Choose the saturated triacylglycerol from the compounds below. A) B) C) D) E)
Q: Choose the polyunsaturated triacylglycerol from the compounds below. A) B) C) D) E)
Q: Which of the following lipids will give a single molecule of fatty acid when hydrolyzed? A) wax B) fat C) phospholipid D) glycolipid E) cholesterol
Q: A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the percentage of total kilocalories due to fat (1 gram of fat = 9 kcal). A) 0.68% of total kilocalories B) 6.1% of total kilocalories C) 11% of total kilocalories D) 55% of total kilocalories E) 100% of total kilocalories
Q: A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the number of kilocalories from fat (1 gram of fat = 9 kcal). A) 4.3 kcal from fat B) 39 kcal from fat C) 71 kcal from fat D) 350 kcal from fat E) 640 kcal from fat
Q: Which of the following fatty acids is most likely to be a liquid at room temperature? A) B) C) D) E)
Q: Which of the following is a fatty acid which is a solid at room temperature? A) B) C) D) E)
Q: Choose the saturated fatty acid from the compounds below. A) B) C) D) E)
Q: Choose the polyunsaturated fatty acid from the compounds below. A) B) C) D) E)
Q: Compared to saturated fatty acids, unsaturated fatty acids have A) longer carbon chains. B) shorter carbon chains. C) higher melting points. D) lower melting points. E) greater intermolecular attraction.
Q: Which of the following fatty acids is a solid at room temperature? A) palmitoleic B) oleic C) stearic D) linoleic E) linolenic
Q: Which of the following is an unsaturated fatty acid? A) myristic B) oleic C) palmitic D) stearic E) lauric
Q: Unsaturated fatty acids have lower melting points than saturated fatty acids because A) they have fewer hydrogen atoms. B) they have more hydrogen atoms. C) their molecules fit closely together. D) the cis double bonds give them an irregular shape. E) the trans double bonds give them an irregular shape.
Q: A polyunsaturated fatty acid contains more than one A) carboxyl group. B) hydroxyl group. C) carbonyl group. D) long carbon chain. E) double bond.
Q: Which of the following is NOT a lipid? A) oleic acid B) cholesterol C) carnuba wax D) DNA E) lecithin
Q: Which of the following lipids will give no fatty acid when hydrolyzed? A) wax B) fat C) phospholipid D) glycolipid E) cholesterol
Q: Which of the following is NOT a function of lipids in the human body? A) energy storage B) insulation C) protection D) emulsification E) pH regulation
Q: Lipids are compounds that are soluble in A) distilled water. B) normal saline solution. C) glucose solution. D) chloroform. E) oxygen.
Q: For the question that follow, identify the class of lipid to which each of the following molecules belongs. A) steroid B) glycerophospholipid C) wax D) bile salt E) prostaglandin
Q: For the question that follow, identify the class of lipid to which each of the following molecules belongs. A) sphingolipid B) simple lipid C) bile salt D) triacylglycerol E) prostaglandin
Q: For the question that follow, identify the class of lipid to which each of the following molecules belongs. A) glycerophospholipid B) triacylglycerol C) glycosphingolipid D) steroid E) wax
Q: For the question that follow, identify the class of lipid to which each of the following molecules belongs. A) triacylglycerol B) wax C) glycerolphospholipid D) bile salt E) steroid
Q: For the question that follow, identify the class of lipid to which each of the following molecules belongs. A) wax B) triacylglycerol C) glycerolphospholipid D) glycosphingolipid E) steroid
Q: Which statement is NOT true? A) Lipids are found in cell membranes. B) Lipids are soluble in organic solvents. C) There are many different types of lipids. D) All lipids contain fatty acids. E) Some hormones are lipids.
Q: Select the correct name for the following.A) ethyl formateB) sodium formateC) formic acid
Q: Identify the family for each of the following compounds.A) ketoneB) carboxylic acidC) ester
Q: Soaps are salts of long chain fatty acids.
Q: Aspirin that has a smell of vinegar has broken down by hydrolysis.
Q: Long chain carboxylic acids are also known as fatty acids.
Q: The IUPAC name of this compound is methyl butanoate.
Q: The ester formed from butyl alcohol and acetic acid is called butyl acetate.
Q: Butyl alcohol is one of the reactants used to make methyl butyrate.
Q: Polyesters are plastics that are used to make fabrics, bottles, and medical devices such as heart valves.
Q: Methyl salicylate (oil of wintergreen) is used therapeutically as a counter-irritant.
Q: An ester is derived from an alcohol and a carboxylic acid.
Q: Esters are formed from the reaction of an ether with a carboxylic acid.
Q: When benzoic acid is neutralized by sodium hydroxide, sodium benzoate is formed.
Q: Carboxylic acids are strong acids.
Q: The Krebs cycle and the citric acid cycle are different processes.
Q: The Krebs cycle is a process that the cell uses to produce energy.
Q: Citric acid is an important part of glycolysis.
Q: Sodium benzoate is a common preservative.
Q: When in solution, carboxylic acids are mostly in their ionized forms.
Q: Sodium propionate is a common disinfectant.
Q: Carboxylic acids with four or fewer carbons are very water soluble.
Q: The boiling points of carboxylic acids are lower than the corresponding alcohols.
Q: Carboxylic acids with more than five carbons are very water soluble.
Q: The IUPAC name of this compound is propanoic acid.
Q: Benzoic acid is an aromatic carboxylic acid.
Q: It is always safe to use any commercial skin care product without doing a test patch first.
Q: Alpha-hydroxy acids should be used at concentrations under 10% in skin care products.
Q: The major acidic component of vinegar is formic acid.
Q: Carboxylic acids are responsible for the sweet taste of fruits and vegetables.
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