Principles of Biochemistry 4th Edition Test bank

PrinciplesLofLBiochemistryL(4th,LFourthLEdition)L-
ByLMoran,LHorton, Scrimgeour,LPerry,L&LRawn.TestLbank

,Contents
Chapter`1 IntroductionLtoLBiochemistry 1
Chapter`2 Water 10
Chapter`3 AminoLAcidsLandLtheLPrimaryLStructuresLofLProteins 27
ChapterL4 Proteins:LThree-DimensionalLStructureLandLFunction 46
Chapter`5 PropertiesLofLEnzymes 65
Chapter`6 MechanismsLofLEnzymes 85
Chapter`7 CoenzymesLandLVitamins 104
ChapterL8 Carbohydrates 119
Chapter`9 LipidsLandLMembranes 137
Chapter`10 IntroductionLtoLMetabolism 153
Chapter`11 Glycolysis 169
ChapterL12 Gluconeogenesis,LTheLPentoseLPhosphateLPathway,
andLGlycogenLMetabolism 185
Chapter`13 TheLCitricLAcidLCycle 199
Chapter`14 ElectronLTransportLandLOxidativeLPhosphorylation 213
Chapter`15 Photosynthesis 227
ChapterL16 LipidLMetabolism 241
Chapter`17 AminoLAcidLMetabolism 256
Chapter`18 NucleotideLMetabolism 269
Chapter`19 NucleicLAcids 284
Chapter`20 DNALReplication,LRepair,LandLRecombination 300
Chapter`21 TranscriptionLandLRNALProcessing 315
Chapter`22 ProteinLSynthesis 330
ChapterL23 RecombinantLDNALTechnology 348

,ChapterL1 IntroductionLtoLBiochemistry

1) WhichL elementsLaccountL forL moreL thanL97%L ofLtheLweightL ofLmostLorganisms?
A) C,L H,LN,LMg,L O,L S
B) C,L H,LN,LO,L P,LS
C) C,L H,LN
D) Fe,L C,L H,LO,L P
E) Ca2+,LK+,LNa+,L Mg2+,LCl-

Answer:L B
PageL Ref:L SectionL2


2) ProteinsLinLbiologicalL membranesL mayLbe
A) porous.
B) attachedL toLtheL membraneL surface.
C) spanL theL membrane.
D) AllL ofLtheLabove
E) BLandLCLonly

Answer:L D
PageL Ref:L SectionL3


3) WhichL statementLaboutL cellulose`isLfalse?
A) ItL isLthe`mostLabundantL polysaccharideL inLnature.
B) ItsLmonomersL areLjoinedL byLglycosidicL bonds.
C) ItL isLpresentL inLtheLstemsLofLflowering`plants.
D) TheLhydroxylLgroupsLofLneighboringLcelluloseLmoleculesLinteractLtoLformLstrong,Linso
lubleLfLibers.
E) ItL isLaL branchedL polymerL of`glucose.

Answer:L E
PageL Ref:L SectionL3




1

, 4) WhenLKeqLofLaL reactionL=L 1,Lthen

A) theLforwardL reactionLisLfasterL thanL theLreverseL reaction.
B) theLreverseL reactionLis`faster`thanL theLforwardL reaction.
C) theLforwardL andL reverseL reactionLrateLconstantsLareLequal.
D) moreL productsLareL formedLthanL reactants.
E) fewerL productsLareL formedLthanL reactants.

Answer:L C
PageL Ref:L SectionL4


5) WhichL statementLisLtrueLaboutL aL reactionLwithLanLequilibriumLconstant,L Keq,LequalL toL1000?

A) TheL forwardL rateL constantL isL1000LtimesLgreaterL thanL theLreverseL rateLconstant.
B) TheL forwardLrateLconstantL isL3L timesLgreaterL thanL reverseL rateLconstant.
C) TheL forwardL rateLconstantL isL1000LtimesLsmallerLthanL theLreverseL rateLconstant.
D) TheL forwardLrateLconstantL isL3L timesLsmallerLthanL theL reverseL rateLconstant.
E) ThereLisLnotL enoughL informationL givenL toLcompareLtheL forwardL andLreverseL rateLconsta
nts.

Answer:L A
PageL Ref:L SectionL4


6) TheL studyL ofLtheL energyL changesL duringL metabolicLreactionsL isLcalledL .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalLheatL dynamics

Answer:L D
PageL Ref:L SectionL4


7) AL spontaneousL chemicalL reactionLalwaysL hasL aL change.
A) positiveL GibbʹsLfreeLenergy
B) negativeLGibbʹsLfreeL energy
C) positiveL enthalpy
D) negativeL enthalpy
E) positiveL entropy

Answer:L B
PageL Ref:L SectionL4




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