Bio-chemistryTestbank
BIO3320Bio-chemistryTestbank
Contents
Chapterg1 IntroductiontoBiochemistry 1
Chapter2 Water 10
Chapter3 AminoAcidsandthePrimaryStructuresofProteins 27
Chapter4 Proteins:Three-DimensionalStructureandFunction 46
Chapter5 PropertiesofEnzymes 65
Chapter6 MechanismsofEnzymes 85
Chapter7 CoenzymesandVitamins 104
Chapter8 Carbohydrates 119
Chapter9 LipidsandMembranes 137
Chapterg10 IntroductiontoMetabolism 153
Chapter11 Glycolysis 169
Chapter12 Gluconeogenesis,ThePentosePhosphatePathway,
andGlycogenMetabolism 185
Chapter13 TheCitricAcidCycle 199
Chapter14 ElectronTransportandOxidativePhosphorylation 213
Chapterg15 Photosynthesis 227
Chapter16 LipidMetabolism 241
Chapter17 AminoAcidMetabolism 256
Chapter18 NucleotideMetabolism 269
Chapter19 NucleicAcids 284
Chapterg20 DNAReplication,Repair,andRecombination 300
Chapter21 TranscriptionandRNAProcessing 315
Chapterg22 ProteinSynthesis 330
Chapter23 RecombinantDNATechnology 348
, Bio-chemistryTestbank
Chapter1 IntroductiontoBiochemistry
1) Whichelementsaccountformorethan97%oftheweightofmost gorganisms?
A) C,H,N,Mg,O,S
B) C,H,N,O,P,S
C) C,H,N
D) Fe,C,H,O,P
E) Ca2+,K+,Na+,Mg2+,Cl-
Answer:B
PageRef:Section2
2) Proteinsinbiologicalmembranesmaybe
A) porous.
B) attachedtothemembranesurface.
C) spanthemembrane.
D) Alloftheabove
E) BgandConly
Answer:D
PageRef:Section3
3) Whichstatementaboutcelluloseisfalse?
A) Itisthemostabundantpolysaccharideinnature.
B) Itsmonomersarejoinedbyglycosidicbonds.
C) Itispresentinthestemsoffloweringplants.
D) Theghydroxylggroupsofgneighboringgcellulosegmoleculesginteractgtogformgstrong,ginsolubl
egfibers.
E) Itisabranchedpolymerofglucose.
Answer:E
PageRef:Section3
1
, Bio-chemistryTestbank
4) WhenKeqofareaction=1,then
A) theforwardreactionisfasterthanthereversereaction.
B) thereversereactionisfasterthantheforwardreaction.
C) theforwardandreversereactionrateconstantsareequal.
D) moreproductsgareformedthanreactants.
E) fewerproductsareformedthanreactants.
Answer:C
PageRef:Section4
5) Whichstatementistrueaboutareactionwithanequilibriumconstant,Keq,equalto1000?
A) Theforwardrateconstantis1000timesgreaterthanthereverserategconstant.
B) Theforwardrategconstantis3timesgreaterthanreverserategconstant.
C) Theforwardrateconstantis1000timessmallerthanthereverserateconstant.
D) Theforwardrateconstantis3timessmallerthanthereverserate gconstant.
E) Thereisnotenoughinformationgiventocomparetheforwardandreverserategconstants.
Answer:A
PageRef:Section4
6) Thestudyoftheenergychangesduringmetabolicreactionsiscalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalheatdynamics
Answer:D
PageRef:Section4
7) Aspontaneouschemicalreactionalwayshasa change.
A) positiveGibbʹsfreeenergy
B) negativeGibbʹsfreeenergy
C) positiveenthalpy
D) negativeenthalpy
E) positiveentropy
Answer:B
PageRef:Section4
2
, Bio-chemistryTestbank
8) Prokaryotesarevaluabletoolsforbiochemistsbecause
A) E.coliiswell-studiedandtypicalofprokaryotes.
B) theycontainasmanygenesaseukaryoticcells.
C) manyoftheirchromosomesaresequenced.
D) theyarenotverydiverseorganisms.
E) Alloftheabove
Answer:C
PageRef:Section6
9) Whichgcellulargcomponentgcarriesgoutgoxidationgreactions,gsomegofgwhichgproduceghydrog
engperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:A
PageRef:Section8
10) WhyisitgimportantgthatgthegenzymesginlysosomesgaregmoregactivegatgacidicpHgthangatgneutra
lgpH?
A) Sinceglysosomesgaregprimarilygfoundginthegstomachgacidgofgmammals,gtheirg
pHgdependencegallowsgforgmaximumgefficiencygforgthegdigestiongofgfoodstuf
fs.
B) Itpreventstheirdiffusionoutofthelysosomes.
C) Itmaximizestheinteractionwiththeirsubstrateswhicharealwaysbases.
D) Itpreventsgthemfromaccidentallydegradingthemacromoleculesinthecytosol.
E) Itallowsforregulationoftheiruptakebythemitochondria.
Answer:D
PageRef:Section8
11) Moleculesgfromglivinggcellsgcannotbesynthesizedoutsidegoflivingcells.gA
nswer:FALSE
PageRef:Section1
12) Fermentationgingthegabsencegofgcellsgdemonstratedgthatmetabolicgprocessesgwerechemicalgi
ngnature.
Answer:TRUE
PageRef:Section1
3
BIO3320Bio-chemistryTestbank
Contents
Chapterg1 IntroductiontoBiochemistry 1
Chapter2 Water 10
Chapter3 AminoAcidsandthePrimaryStructuresofProteins 27
Chapter4 Proteins:Three-DimensionalStructureandFunction 46
Chapter5 PropertiesofEnzymes 65
Chapter6 MechanismsofEnzymes 85
Chapter7 CoenzymesandVitamins 104
Chapter8 Carbohydrates 119
Chapter9 LipidsandMembranes 137
Chapterg10 IntroductiontoMetabolism 153
Chapter11 Glycolysis 169
Chapter12 Gluconeogenesis,ThePentosePhosphatePathway,
andGlycogenMetabolism 185
Chapter13 TheCitricAcidCycle 199
Chapter14 ElectronTransportandOxidativePhosphorylation 213
Chapterg15 Photosynthesis 227
Chapter16 LipidMetabolism 241
Chapter17 AminoAcidMetabolism 256
Chapter18 NucleotideMetabolism 269
Chapter19 NucleicAcids 284
Chapterg20 DNAReplication,Repair,andRecombination 300
Chapter21 TranscriptionandRNAProcessing 315
Chapterg22 ProteinSynthesis 330
Chapter23 RecombinantDNATechnology 348
, Bio-chemistryTestbank
Chapter1 IntroductiontoBiochemistry
1) Whichelementsaccountformorethan97%oftheweightofmost gorganisms?
A) C,H,N,Mg,O,S
B) C,H,N,O,P,S
C) C,H,N
D) Fe,C,H,O,P
E) Ca2+,K+,Na+,Mg2+,Cl-
Answer:B
PageRef:Section2
2) Proteinsinbiologicalmembranesmaybe
A) porous.
B) attachedtothemembranesurface.
C) spanthemembrane.
D) Alloftheabove
E) BgandConly
Answer:D
PageRef:Section3
3) Whichstatementaboutcelluloseisfalse?
A) Itisthemostabundantpolysaccharideinnature.
B) Itsmonomersarejoinedbyglycosidicbonds.
C) Itispresentinthestemsoffloweringplants.
D) Theghydroxylggroupsofgneighboringgcellulosegmoleculesginteractgtogformgstrong,ginsolubl
egfibers.
E) Itisabranchedpolymerofglucose.
Answer:E
PageRef:Section3
1
, Bio-chemistryTestbank
4) WhenKeqofareaction=1,then
A) theforwardreactionisfasterthanthereversereaction.
B) thereversereactionisfasterthantheforwardreaction.
C) theforwardandreversereactionrateconstantsareequal.
D) moreproductsgareformedthanreactants.
E) fewerproductsareformedthanreactants.
Answer:C
PageRef:Section4
5) Whichstatementistrueaboutareactionwithanequilibriumconstant,Keq,equalto1000?
A) Theforwardrateconstantis1000timesgreaterthanthereverserategconstant.
B) Theforwardrategconstantis3timesgreaterthanreverserategconstant.
C) Theforwardrateconstantis1000timessmallerthanthereverserateconstant.
D) Theforwardrateconstantis3timessmallerthanthereverserate gconstant.
E) Thereisnotenoughinformationgiventocomparetheforwardandreverserategconstants.
Answer:A
PageRef:Section4
6) Thestudyoftheenergychangesduringmetabolicreactionsiscalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalheatdynamics
Answer:D
PageRef:Section4
7) Aspontaneouschemicalreactionalwayshasa change.
A) positiveGibbʹsfreeenergy
B) negativeGibbʹsfreeenergy
C) positiveenthalpy
D) negativeenthalpy
E) positiveentropy
Answer:B
PageRef:Section4
2
, Bio-chemistryTestbank
8) Prokaryotesarevaluabletoolsforbiochemistsbecause
A) E.coliiswell-studiedandtypicalofprokaryotes.
B) theycontainasmanygenesaseukaryoticcells.
C) manyoftheirchromosomesaresequenced.
D) theyarenotverydiverseorganisms.
E) Alloftheabove
Answer:C
PageRef:Section6
9) Whichgcellulargcomponentgcarriesgoutgoxidationgreactions,gsomegofgwhichgproduceghydrog
engperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:A
PageRef:Section8
10) WhyisitgimportantgthatgthegenzymesginlysosomesgaregmoregactivegatgacidicpHgthangatgneutra
lgpH?
A) Sinceglysosomesgaregprimarilygfoundginthegstomachgacidgofgmammals,gtheirg
pHgdependencegallowsgforgmaximumgefficiencygforgthegdigestiongofgfoodstuf
fs.
B) Itpreventstheirdiffusionoutofthelysosomes.
C) Itmaximizestheinteractionwiththeirsubstrateswhicharealwaysbases.
D) Itpreventsgthemfromaccidentallydegradingthemacromoleculesinthecytosol.
E) Itallowsforregulationoftheiruptakebythemitochondria.
Answer:D
PageRef:Section8
11) Moleculesgfromglivinggcellsgcannotbesynthesizedoutsidegoflivingcells.gA
nswer:FALSE
PageRef:Section1
12) Fermentationgingthegabsencegofgcellsgdemonstratedgthatmetabolicgprocessesgwerechemicalgi
ngnature.
Answer:TRUE
PageRef:Section1
3
