BIOCHEM EXAM 3 CLICKER QUESTIONS AND CORRECT ANSWERS

BIOCHEM EXAM 3 CLICKER QUESTIONS
AND CORRECT ANSWERS
WhatA2sortA2ofA2carbohydrateA2(below)A2isA2foundA2onA2glycolipids,A2oneA2ofA2theA2glycoc
onjugates?
A.A2Peptidoglycan
B.A2Glycosaminoglycan
C.A2BranchedA2heteropolysaccharide
D.A2Glycoside
E.A2LectinA2-A2Ans--C

PhospholipaseA2CA2actsA2onA2theA2lipidA2shownA2here.
WhatA2wouldA2beA2theA2bestA2methodA2toA2purifyA2theA2resultingA2phosphorylatedA2ringA2p
roduct?
A.A2GelA2filtrationA2chromatography
B.A2HydrophobicA2interactionA2chromatography
C.A2AffinityA2chromatography
D.A2SDS-PAGE
E.A2IonA2exchangeA2chromatographyA2-A2Ans--E

WhichA2ofA2theA2followingA2wouldA2decreaseA2theA2transitionA2temperatureA2forA2aA2mixtur
eA2ofA2triglyceridesA2andA2cholesterol?
A.A2AddA2glycerophospholipidsA2withA2twoA2(18:0).
B.A2ReduceA2cholesterolA2concentration.
C.A2AddA2triglyceridesA2withA2twoA2(16:1)A2andA2oneA2(21:2)A2fattyA2acids.
D.A2AddA2diacylglyerolsA2withA2fullyA2saturatedA2fattyA2acids.
E.A2AddA2aA2lowA2concentrationA2ofA2aA2wax.A2-A2Ans--C

WhichA2ofA2theA2followingA2wouldA2resultA2fromA2theA2actionA2ofA2phospholipaseA2CA2onA2a
A2membraneA2glycerophospholipid?
A.A2GlycerolA2andA2twoA2fattyA2acids
B.A2OneA2fattyA2acidA2andA2oneA2monoacylglycerol
C.A2AA2sugarA2phosphateA2andA2glycerol
D.A2AA2lysophospholipidA2andA2aA2diacylglycerol
E.A2AA2diacylglycerolA2andA2aA2polarA2groupA2containingA2phosphateA2-A2Ans--E

AA2novelA2subclassA2ofA2thromboxaneA2wasA2discoveredA2inA2lipidsA2isolatedA2fromA2aA2ne
wlyA2discoveredA2poisonA2dartA2fromA2theA2AmazonA2valley.A2WhatA2uniqueA2structuralA2fe
atureA2isA2likelyA2presentA2inA2theseA2lipids?
A)A2FourA2conjugatedA2doubleA2bonds
B)A2AA2sixA2memberedA2ring
C)A2AA2long-chainA2alcoholA2boundA2toA2aA2double-ring
D)A2AA2fiveA2memberedA2ring
E)A2AnA2amidoA2groupA2-A2Ans--B

, LipidsA2wereA2extractedA2fromA2plasmaA2membranes.A2WhatA2methodA2couldA2beA2usedA2
toA2separateA2themA2byA2exploitingA2differencesA2inA2volatility?
A.A2Gas-liquidA2chromatography
B.A2AdsorptionA2columnA2chromatography
C.A2ThinA2layerA2chromatography
D.A2MassA2spectroscopy
E.A2Ion-exchangeA2chromatographyA2-A2Ans--A

NuclearA2magneticA2resonanceA2spectroscopyA2wasA2performedA2onA2aA2derivativeA2ofA2c
ortisol,A2aA2steroidA2hormone.A2WhatA2structuralA2featureA2wasA2notA2observedA2inA2thisA2
moleculeA2thatA2wouldA2beA2presentA2inA2sterols?A2
A.A2FourA2six-memberedA2ringsA2inA2theA2nucleusA2ratherA2thanA2three.
B.A2AA2carbonylA2ratherA2thanA2aA2hydroxylA2onA2theA2A-ring
C.A2AnA2alkylA2chainA2onA2theA2D-ring
D.A2CharacteristicA2alcoholA2groupsA2onA2eachA2ofA2theA2fourA2rings
E.A2AnA2absenceA2ofA2polarA2groupsA2-A2Ans--B

HowA2doA2theA2featuresA2ofA2VitaminsA2EA2andA2KA2causeA2themA2toA2beA2inA2aA2differentA2
cellularA2locationA2thanA2VitaminsA2BA2andA2C?A2
A.A2TheirA2massA2isA2tooA2largeA2toA2moveA2throughA2membraneA2transporters,A2unlikeA2V
itaminsA2BA2andA2C.
B.A2TheyA2areA2synthesizedA2inA2endoplasmicA2reticulum,A2unlikeA2VitaminsA2BA2andA2C,A2
whichA2areA2madeA2inA2cytosol.
C.A2TheyA2haveA2receptorsA2onA2theA2plasmaA2membrane,A2whereasA2VitaminsA2BA2andA2
CA2haveA2nuclearA2receptors.
D.A2TheyA2areA2hydrophobic,A2soA2theyA2areA2locatedA2inA2membranesA2ratherA2thanA2inA2t
heA2cytosol,A2likeA2VitaminsA2BA2andA2C.
E.A2TheyA2areA2negativelyA2charged,A2andA2areA2segregatedA2inA2theA2plasmaA2membran
eA2ratherA2thanA2neutralA2asA2VitaminsA2BA2andA2C,A2whichA2areA2foundA2inA2manyA2cellula
rA2locationsA2-A2Ans--D

LipidA2storageA2diseasesA2areA2theA2resultA2ofA2alterationsA2ofA2whatA2chemicalA2groupA2o
nA2membraneA2lipids?A2
A.A2FattyA2acids
B.A2Carbohydrate
C.A2Sphingosine
D.A2Peptide
E.A2GlycerolA2-A2Ans--B

WhichA2isA2notA2aA2significantA2structuralA2differenceA2betweenA2archaealA2membraneA2lip
idsA2andA2mostA2otherA2membraneA2lipids?A2
A.A2EtherA2linkages
B.A2VeryA2longA2chainA2hydrocarbons
C.A2StabilityA2atA2temperatureA2andA2pHA2extremes
D.A2TwoA2backboneA2molecules