Test Bank for Essential Biochemistry – 3rd Edition by Charlotte W. Pratt – Kathleen Cornely for $30

INSTANT DOWNLOADWhat student Can Expect From A Test Bank?A test bank will include the following questions:True/FalseMultiple Choice QuestionsMatching QuestionsFill In The BlanksEssay QuestionsShort QuestionsDescriptionPackage Title: Pratt & Cornely Test BankCourse Title: Pratt & CornelyChapter Number: 8 Question type: Multiple Choice 1) What are the characteristics of most unsaturated fatty acids found within a human cell? A) protonated carboxylic acid and trans double bondsB) deprotonated carboxylic acid and trans double bondsC) protonated carboxylic acid and cis double bondsD) deprotonated carboxylic acid and cis double bondsE) none of the above Answer: D Difficulty: EasySection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 2) Which of the following is considered an omega-3 fatty acid? A) 9,12-Octadecadienoic acidB) 9,12,15-Octadecatrienoic acidC) 6,9,12-Octadecatrienoic acidD) 8,11,14-Eicosatrienoic acidE) 5,8,11,14-Eicosatetraenoic acid Answer: B Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 3) The major lipid component of cell membranes are _____. A) triacylglycerolsB) cholesterolC) glycerophospholipidsD) plasmologensE) gangliosides Answer: C Difficulty: EasySection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 4) Which of the following alcohols is esterified to the phosphate group of glycerophospholipids? A) cholineB) ethanolamineC) glycerolD) serineE) all of the above Answer: E Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 5) The most notable difference between _____ and other lipids is the presence of four fused rings. A) cholesterolB) arachidonic acidC) gangliosidesD) plasmologensE) triacylglycerols Answer: A Difficulty: EasySection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 6) Which of the following terms describes all glycerophospholipid? A) zwitterionicB) amphipathicC) nonpolarD) amphotericE) none of the above Answer: B Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 7) Which of the following is the primary building block for the synthesis of molecules like cholesterol or ubiquinone? A) acetyl-CoAB) palmitic acidC) cholineD) isopreneE) sphingosine Answer: D Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 8) A type of lipid that commonly forms a waterproof barrier and is composed of a fatty acid and a fatty alcohol is called a _____. A) terpenoidB) gangliosideC) capsaicinD) steroidE) wax Answer: E Difficulty: EasySection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 9) Which of the following vitamins is derived from cholesterol? A) vitamin AB) vitamin DC) vitamin ED) vitamin KE) none of the above Answer: B Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 10) What two molecules are used in the synthesis of sphingosine? A) arachidonic acid and serineB) stearic acid and isopreneC) palmitic acid and cholineD) linoleic acid and isopreneE) palmitic acid and serine Answer: E Difficulty: MediumSection Reference: 8-1Learning Objective: Recognize the physical characteristics of lipids 11) Which of the following explains why free fatty acids do not form bilayers? A) the width of the polar head is greater than the nonpolar tailB) the width of the polar head is less than the nonpolar tailC) the width of the polar head is equal to the nonpolar tailD) the width of the nonpolar head is greater than the polar tailE) the width of the nonpolar head is less than the polar tail Answer: A Difficulty: MediumSection Reference: 8-2Learning Objective: Describe the properties of the lipid bilayer 12) As temperatures grow colder with the onset of winter, animals will adapt by changing the fatty acid composition of cell membranes. What characteristics of fatty acids will be seen? A) longer chains with greater unsaturationB) longer chains with greater saturationC) shorter chains with greater unsaturationD) shorter chains with greater saturationE) chain length and saturation do not change in a cell membrane Answer: C Difficulty: MediumSection Reference: 8-2Learning Objective: Describe the properties of the lipid bilayer 13) A membrane raft is a(n) _____ in the lipid bilayer of a cell membrane. A) transmembrane proteinB) integral membrane protein oriented to the intracellular sideC) integral membrane protein oriented to the extracellular sideD) region of high cholesterol and sphingolipid contentE) none of the above Answer: D Difficulty: MediumSection Reference: 8-2Learning Objective: Describe the properties of the lipid bilayer 14) Which of the following is true regarding membrane asymmetry? A) transverse diffusion occurs very quicklyB) lateral diffusion occurs very slowlyC) a flippase causes lateral diffusion to occur very rapidlyD) carbohydrates attached to membrane lipids are usually found on the cytosolic side of the membraneE) none of the above Answer: E Difficulty: MediumSection Reference: 8-2Learning Objective: Describe the properties of the lipid bilayer 15) In an a-helical protein that spans a cell membrane, _____ would likely be in the center of the membrane while _____ would likely be associated with the polar head groups and _____ would likely be associated with the aqueous environment A) Trp; Asn; AlaB) Leu; Gln; AspC) Tyr; Glu; GlyD) Ile; Arg; GlnE) Val; Ser; Thr Answer: B Difficulty: HardSection Reference: 8-3Learning Objective: Explain how proteins associate with membranes 16) Which of the following statements describes integral membrane proteins? A) they never completely span the lipid bilayerB) they are easily removed by changes in pH or high saltC) amino acids that contact the core of the membrane are hydrophobicD) they tend to be water solubleE) their association with the membrane is through an attached fatty acyl or prenyl group Answer: C Difficulty: MediumSection Reference: 8-3Learning Objective: Explain how proteins associate with membranes 17) If a transmembrane domain of protein contains b-sheet structure, the overall structure of the transmembrane portion is likely a ____________. A) b-barrelB) b-tubeC) b-turnD) b-helixE) none of the above Answer: A Difficulty: EasySection Reference: 8-3Learning Objective: Explain how proteins associate with membranes 18) Which fatty acid is commonly attached to proteins to allow membrane localization? A) eicosapentaenoic acid (EPA)B) arachidonic acidC) linoleic acidD) myristic acidE) farnesylic acid Answer: D Difficulty: MediumSection Reference: 8-3Learning Objective: Explain how proteins associate with membranes 19) If polar amino acids are found in a membrane spanning a-helical region, they are most likely _____. A) mutationsB) modified with nonpolar groups by prenylation, methylation and/or acylationC) hydrogen-bonded to other polar amino acids to prevent interaction with the membrane lipidsD) hydrogen-bonded with hydroxyl groups of the membrane fatty acidsE) none of the above Answer: C Difficulty: HardSection Reference: 8-3Learning Objective: Explain how proteins associate with membranes 20) Which of the following is a characteristic of integral membrane proteins? A) most of their movement is by lateral diffusionB) transverse diffusion occurs often but rather slowlyC) interactions between proteins makes the membrane highly rigidD) all have carbohydrates attached to the extracellular domainE) none of the above Answer: A Difficulty: MediumSection Reference: 8-4Learning Objective: Summarize the features of the fluid mosaic model 21) The carbohydrate portion of a membrane spanning glycoprotein is found _____. A) spanning the membraneB) on both the cytoplasmic and extracellular sides of the membraneC) only on the cytoplasmic side of the membraneD) only on the extracellular side of the membraneE) carbohydrates are not found on membrane spanning glycoproteins Answer: D Difficulty: MediumSection Reference: 8-4Learning Objective: Summarize the features of the fluid mosaic model 22) Which of the following aspects of membrane protein movement is explained by the fluid mosaic model? A) proteins that are immobile are often esterified to cholesterol via an Asp residueB) proteins that are mobile only in a small area are sequestered by proteins attached to the cytoskeletonC) proteins that freely diffuse through the membrane often undergo flip-floppingD) proteins confined to a lipid raft are linked to phosphatidylserine via and amide bondE) none of the above Answer: B Difficulty: HardSection Reference: 8-4Learning Objective: Summarize the features of the fluid mosaic mode

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