Bio-chemistrybTestb bank
BIO 3320Bio-chemistry Test bank
b b b
Contents
Chapterb1 IntroductionbtobBiochemistry 1
Chapterb2 Water 10
Chapterb3 AminobAcidsbandbthebPrimarybStructuresbofbProteins 27
Chapterb4 Proteins:bThree-DimensionalbStructurebandbFunction 46
Chapterb5 PropertiesbofbEnzymes 65
Chapterb6 MechanismsbofbEnzymes 85
Chapterb7 CoenzymesbandbVitamins 104
Chapterb8 Carbohydrates 119
Chapterb9 LipidsbandbMembranes 137
Chapterb10 IntroductionbtobMetabolism 153
Chapterb11 Glycolysis 169
Chapterb12 Gluconeogenesis,bThebPentosebPhosphatebPathway,
andbGlycogenbMetabolism 185
Chapterb13 ThebCitricbAcidbCycle 199
Chapterb14 ElectronbTransportbandbOxidativebPhosphorylation 213
Chapterb15 Photosynthesis 227
Chapterb16 LipidbMetabolism 241
Chapterb17 AminobAcidbMetabolism 256
Chapterb18 NucleotidebMetabolism 269
Chapterb19 NucleicbAcids 284
Chapterb20 DNAbReplication,bRepair,bandbRecombination 300
Chapterb21 TranscriptionbandbRNAbProcessing 315
Chapterb22 ProteinbSynthesis 330
Chapterb23 RecombinantbDNAbTechnology 348
, Bio-chemistrybTestb bank
Chapter 1 Introduction to Biochemistry
b b b
1) Whichbelementsbaccountb forb morebthanb97%b ofbthebweightb ofbmostborganisms?
A) C,b H,bN,bMg,bO,b S
B) C,b H,bN,bO,bP,bS
C) C,b H,bN
D) Fe,bC,b H,bO,b P
E) Ca2+,b K+,b Na+,b Mg2+,b Cl-
Answer:b B
PagebRef:b Sectionb 2
2) Proteinsbinbbiologicalbmembranesb maybbe
A) porous.
B) attachedb tobthebmembraneb surface.
C) spanb thebmembrane.
D) Allb ofbthebabove
E) BbandbCbonly
Answer:b D
PagebRef:b Sectionb 3
3) Whichbstatementb aboutb cellulosebisbfalse?
A) Itb isbthebmostbabundantb polysaccharideb inbnature.
B) Itsbmonomersb arebjoinedb bybglycosidicb bonds.
C) Itb isbpresentb inbthebstemsbofbfloweringb plants.
D) Thebhydroxylbgroupsb ofbneighboringbcellulosebmoleculesbinteractbtobformbstrong,binsolubleb
fibers.
E) Itb isbab branchedb polymerb ofbglucose.
Answer:b E
PagebRef:b Sectionb 3
1
, Bio-chemistrybTestb bank
4) WhenbKeqbofbabreactionb=b1,bthen
A) thebforwardb reactionbisbfasterbthanb theb reverseb reaction.
B) theb reverseb reactionbisbfasterb thanb thebforwardb reaction.
C) thebforwardbandb reverseb reactionbratebconstantsbareb equal.
D) moreb productsbarebformedbthanb reactants.
E) fewerb productsbareb formedbthanb reactants.
Answer:b C
PagebRef:b Sectionb 4
5) Whichbstatementb isbtruebaboutb ab reactionbwithbanbequilibriumb constant,b Keq,b equalb tob1000?
A) Theb forwardbratebconstantb isb1000b timesbgreaterb thanb thebreverseb ratebconstant.
B) Thebforwardbratebconstantb isb3b timesbgreaterb thanb reverseb ratebconstant.
C) Theb forwardbratebconstantb isb1000b timesb smallerbthanbthebreverseb ratebconstant.
D) Thebforwardbratebconstantb isb3b timesbsmallerbthanb thebreverseb ratebconstant.
E) Therebisbnotb enoughb informationb givenbtobcomparebthebforwardbandb reverseb ratebconstants.
Answer:b A
PagebRef:b Sectionb 4
6) Theb studyb ofbtheb energyb changesb duringb metabolicb reactionsb isbcalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalbheatb dynamics
Answer:b D
PagebRef:b Sectionb 4
7) Abspontaneousb chemicalb reactionbalwaysb hasb a change.
A) positiveb Gibbʹsbfreeb energy
B) negativebGibbʹsbfreeb energy
C) positiveb enthalpy
D) negativebenthalpy
E) positivebentropy
Answer:b B
PagebRef:b Sectionb 4
2
, Bio-chemistrybTestb bank
8) Prokaryotesbareb valuablebtoolsb forb biochemistsb because
A) E.bcolibisbwell-studiedb andbtypicalb ofbprokaryotes.
B) theybcontainb asbmanybgenesb asb eukaryoticb cells.
C) manybofbtheirb chromosomesb areb sequenced.
D) theybareb notb verybdiverseborganisms.
E) Allb ofbthebabove
Answer:b C
PagebRef:b Sectionb 6
9) Whichbcellularbcomponentbcarriesboutboxidationbreactions,bsomebofbwhichbproducebhydrogenb
peroxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:b A
PagebRef:b Sectionb 8
10) Whybisbitbimportantbthatbthebenzymesbinblysosomesbarebmorebactivebatbacidicb pHbthanbatbneutral
bpH?
A) Sinceblysosomesbarebprimarilybfoundbinbthebstomachbacidbofbmammals,btheirbpH
bdependenceballowsbforbmaximumbefficiencybforbthebdigestionbofbfoodstuffs.
B) Itb preventsbtheirbdiffusionboutb ofbtheblysosomes.
C) Itbmaximizesbthebinteractionb withbtheirb substratesb whichb arebalwaysb bases.
D) Itb preventsbthemb frombaccidentallyb degradingb thebmacromoleculesb inbthebcytosol.
E) Itb allowsb forb regulationb ofbtheirbuptakeb bybthebmitochondria.
Answer:b D
PagebRef:b Sectionb 8
11) Moleculesbfromblivingbcellsbcannotb bebsynthesizedb outsidebofblivingb cells.
Answer:b FALSE
b
PagebRef:b Sectionb 1
12) Fermentationbinbthebabsencebofbcellsbdemonstratedbthatb metabolicbprocessesbwerebchemicalbin
bnature.
Answer:b TRUE
PagebRef:b Sectionb 1
3
BIO 3320Bio-chemistry Test bank
b b b
Contents
Chapterb1 IntroductionbtobBiochemistry 1
Chapterb2 Water 10
Chapterb3 AminobAcidsbandbthebPrimarybStructuresbofbProteins 27
Chapterb4 Proteins:bThree-DimensionalbStructurebandbFunction 46
Chapterb5 PropertiesbofbEnzymes 65
Chapterb6 MechanismsbofbEnzymes 85
Chapterb7 CoenzymesbandbVitamins 104
Chapterb8 Carbohydrates 119
Chapterb9 LipidsbandbMembranes 137
Chapterb10 IntroductionbtobMetabolism 153
Chapterb11 Glycolysis 169
Chapterb12 Gluconeogenesis,bThebPentosebPhosphatebPathway,
andbGlycogenbMetabolism 185
Chapterb13 ThebCitricbAcidbCycle 199
Chapterb14 ElectronbTransportbandbOxidativebPhosphorylation 213
Chapterb15 Photosynthesis 227
Chapterb16 LipidbMetabolism 241
Chapterb17 AminobAcidbMetabolism 256
Chapterb18 NucleotidebMetabolism 269
Chapterb19 NucleicbAcids 284
Chapterb20 DNAbReplication,bRepair,bandbRecombination 300
Chapterb21 TranscriptionbandbRNAbProcessing 315
Chapterb22 ProteinbSynthesis 330
Chapterb23 RecombinantbDNAbTechnology 348
, Bio-chemistrybTestb bank
Chapter 1 Introduction to Biochemistry
b b b
1) Whichbelementsbaccountb forb morebthanb97%b ofbthebweightb ofbmostborganisms?
A) C,b H,bN,bMg,bO,b S
B) C,b H,bN,bO,bP,bS
C) C,b H,bN
D) Fe,bC,b H,bO,b P
E) Ca2+,b K+,b Na+,b Mg2+,b Cl-
Answer:b B
PagebRef:b Sectionb 2
2) Proteinsbinbbiologicalbmembranesb maybbe
A) porous.
B) attachedb tobthebmembraneb surface.
C) spanb thebmembrane.
D) Allb ofbthebabove
E) BbandbCbonly
Answer:b D
PagebRef:b Sectionb 3
3) Whichbstatementb aboutb cellulosebisbfalse?
A) Itb isbthebmostbabundantb polysaccharideb inbnature.
B) Itsbmonomersb arebjoinedb bybglycosidicb bonds.
C) Itb isbpresentb inbthebstemsbofbfloweringb plants.
D) Thebhydroxylbgroupsb ofbneighboringbcellulosebmoleculesbinteractbtobformbstrong,binsolubleb
fibers.
E) Itb isbab branchedb polymerb ofbglucose.
Answer:b E
PagebRef:b Sectionb 3
1
, Bio-chemistrybTestb bank
4) WhenbKeqbofbabreactionb=b1,bthen
A) thebforwardb reactionbisbfasterbthanb theb reverseb reaction.
B) theb reverseb reactionbisbfasterb thanb thebforwardb reaction.
C) thebforwardbandb reverseb reactionbratebconstantsbareb equal.
D) moreb productsbarebformedbthanb reactants.
E) fewerb productsbareb formedbthanb reactants.
Answer:b C
PagebRef:b Sectionb 4
5) Whichbstatementb isbtruebaboutb ab reactionbwithbanbequilibriumb constant,b Keq,b equalb tob1000?
A) Theb forwardbratebconstantb isb1000b timesbgreaterb thanb thebreverseb ratebconstant.
B) Thebforwardbratebconstantb isb3b timesbgreaterb thanb reverseb ratebconstant.
C) Theb forwardbratebconstantb isb1000b timesb smallerbthanbthebreverseb ratebconstant.
D) Thebforwardbratebconstantb isb3b timesbsmallerbthanb thebreverseb ratebconstant.
E) Therebisbnotb enoughb informationb givenbtobcomparebthebforwardbandb reverseb ratebconstants.
Answer:b A
PagebRef:b Sectionb 4
6) Theb studyb ofbtheb energyb changesb duringb metabolicb reactionsb isbcalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalbheatb dynamics
Answer:b D
PagebRef:b Sectionb 4
7) Abspontaneousb chemicalb reactionbalwaysb hasb a change.
A) positiveb Gibbʹsbfreeb energy
B) negativebGibbʹsbfreeb energy
C) positiveb enthalpy
D) negativebenthalpy
E) positivebentropy
Answer:b B
PagebRef:b Sectionb 4
2
, Bio-chemistrybTestb bank
8) Prokaryotesbareb valuablebtoolsb forb biochemistsb because
A) E.bcolibisbwell-studiedb andbtypicalb ofbprokaryotes.
B) theybcontainb asbmanybgenesb asb eukaryoticb cells.
C) manybofbtheirb chromosomesb areb sequenced.
D) theybareb notb verybdiverseborganisms.
E) Allb ofbthebabove
Answer:b C
PagebRef:b Sectionb 6
9) Whichbcellularbcomponentbcarriesboutboxidationbreactions,bsomebofbwhichbproducebhydrogenb
peroxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:b A
PagebRef:b Sectionb 8
10) Whybisbitbimportantbthatbthebenzymesbinblysosomesbarebmorebactivebatbacidicb pHbthanbatbneutral
bpH?
A) Sinceblysosomesbarebprimarilybfoundbinbthebstomachbacidbofbmammals,btheirbpH
bdependenceballowsbforbmaximumbefficiencybforbthebdigestionbofbfoodstuffs.
B) Itb preventsbtheirbdiffusionboutb ofbtheblysosomes.
C) Itbmaximizesbthebinteractionb withbtheirb substratesb whichb arebalwaysb bases.
D) Itb preventsbthemb frombaccidentallyb degradingb thebmacromoleculesb inbthebcytosol.
E) Itb allowsb forb regulationb ofbtheirbuptakeb bybthebmitochondria.
Answer:b D
PagebRef:b Sectionb 8
11) Moleculesbfromblivingbcellsbcannotb bebsynthesizedb outsidebofblivingb cells.
Answer:b FALSE
b
PagebRef:b Sectionb 1
12) Fermentationbinbthebabsencebofbcellsbdemonstratedbthatb metabolicbprocessesbwerebchemicalbin
bnature.
Answer:b TRUE
PagebRef:b Sectionb 1
3
