Bio-chemistryhTesthbank
BIO 3320Bio-chemistry Test bank
h h h
Contents
Chapterh1 IntroductionhtohBiochemistry 1
Chapterh2 Water 10
Chapterh3 AminohAcidshandhthehPrimaryhStructureshofhProteins 27
Chapterh4 Proteins:hThree-DimensionalhStructurehandhFunction 46
Chapterh5 PropertieshofhEnzymes 65
Chapterh6 MechanismshofhEnzymes 85
Chapterh7 CoenzymeshandhVitamins 104
Chapterh8 Carbohydrates 119
Chapterh9 LipidshandhMembranes 137
Chapterh10 IntroductionhtohMetabolism 153
Chapterh11 Glycolysis 169
Chapterh12 Gluconeogenesis,hThehPentosehPhosphatehPathway,
andhGlycogenhMetabolism 185
Chapterh13 ThehCitrichAcidhCycle 199
Chapterh14 ElectronhTransporthandhOxidativehPhosphorylation 213
Chapterh15 Photosynthesis 227
Chapterh16 LipidhMetabolism 241
Chapterh17 AminohAcidhMetabolism 256
Chapterh18 NucleotidehMetabolism 269
Chapterh19 NucleichAcids 284
Chapterh20 DNAhReplication,hRepair,handhRecombination 300
Chapterh21 TranscriptionhandhRNAhProcessing 315
Chapterh22 ProteinhSynthesis 330
Chapterh23 RecombinanthDNAhTechnology 348
, Bio-
chemistryhTesthbank
Chapter 1 Introduction to Biochemistry
h h h
1) Whichh elementshaccounth forh morehthanh97%h ofhthehweighth ofhmosthorganisms?
A) C,h H,hN,hMg,h O,h S
B) C,h H,hN,hO,h P,hS
C) C,h H,hN
D) Fe,hC,h H,hO,h P
E) Ca2+,h K+,h Na+,h Mg2+,h Cl-
Answer:h B
PagehRef:h Sectionh 2
2) Proteinshinhbiologicalh membranesh mayhbe
A) porous.
B) attachedh tohtheh membraneh surface.
C) spanh thehmembrane.
D) Allh ofhthehabove
E) BhandhChonly
Answer:h D
PagehRef:h Sectionh 3
3) Whichh statementh abouth cellulosehishfalse?
A) Ith ishthehmosthabundanth polysaccharideh inhnature.
B) Itshmonomersh arehjoinedh byhglycosidich bonds.
C) Ith ishpresenth inhthehstemshofhfloweringh plants.
D) Theh hydroxylh groupsh ofh neighboringh celluloseh moleculesh interacth tohformh strong,h insolubl
ehfibers.
E) Ith ishah branchedh polymerh ofhglucose.
Answer:h E
PagehRef:h Sectionh 3
1
, Bio-
chemistryhTesthbank
4) WhenhKeqhofhah reactionh=h1,hthen
A) thehforwardh reactionhish fasterh thanh theh reverseh reaction.
B) theh reverseh reactionhish fasterh thanh thehforwardh reaction.
C) thehforwardh andh reverseh reactionh ratehconstantsh areh equal.
D) moreh productshareh formedhthanh reactants.
E) fewerh productsh areh formedh thanh reactants.
Answer:h C
PagehRef:h Sectionh 4
5) Whichh statementh ishtruehabouth ah reactionhwithhanhequilibriumh constant,h Keq,h equalh toh1000?
A) Theh forwardh ratehconstanth ish1000h timeshgreaterh thanh thehreverseh ratehconstant.
B) Thehforwardh ratehconstanth ish3h timeshgreaterh thanh reverseh ratehconstant.
C) Theh forwardh rateh constanth ish1000h timesh smallerhthanh thehreverseh ratehconstant.
D) Theh forwardh ratehconstanth ish3h timeshsmallerhthanh thehreverseh ratehconstant.
E) Therehish noth enoughh informationh givenh tohcomparehthehforwardh andh reverseh ratehconstants.
Answer:h A
PagehRef:h Sectionh 4
6) Theh studyh ofhtheh energyh changesh duringh metabolich reactionsh ish called .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalh heath dynamics
Answer:h D
PagehRef:h Sectionh 4
7) Ah spontaneoush chemicalh reactionhalwaysh hash a change.
A) positiveh Gibbʹsh freeh energy
B) negativeh Gibbʹsh freeh energy
C) positiveh enthalpy
D) negativehenthalpy
E) positiveh entropy
Answer:h B
PagehRef:h Sectionh 4
2
, Bio-
chemistryhTesthbank
8) Prokaryoteshareh valuablehtoolsh forh biochemistsh because
A) E.hcolihishwell-studiedh andhtypicalh ofh prokaryotes.
B) theyhcontainh ashmanyh genesh ash eukaryotich cells.
C) manyh ofhtheirh chromosomesh areh sequenced.
D) theyhareh noth veryh diversehorganisms.
E) Allh ofhthehabove
Answer:h C
PagehRef:h Sectionh 6
9) Whichh cellularh componenth carriesh outh oxidationh reactions,h someh ofh whichh produceh hydroge
nhperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:h A
PagehRef:h Sectionh 8
10) Whyhishith importanth thath theh enzymesh inhlysosomesh arehmorehactivehath acidich pHh thanh ath neutr
alhpH?
A) Sincehlysosomesh areh primarilyh foundh inhthehstomachhacidh ofhmammals,h theirh p
Hhdependenceh allowsh forh maximumhefficiencyhforh thehdigestionh ofhfoodstuffs.
B) Ith preventshtheirhdiffusionhouth ofhthehlysosomes.
C) Ith maximizesh thehinteractionh withhtheirh substratesh whichh areh alwaysh bases.
D) Ith preventsh themh fromh accidentallyh degradingh thehmacromoleculesh inhthehcytosol.
E) Ith allowsh forh regulationh ofhtheirhuptakeh byhthehmitochondria.
Answer:h D
PagehRef:h Sectionh 8
11) Moleculesh fromh livingh cellshcannoth behsynthesizedh outsideh ofhlivingh cell
s.hAnswer:h FALSE
PagehRef:h Sectionh 1
12) Fermentationh inhthehabsencehofhcellsh demonstratedh thath metabolich processesh werehchemicalh i
nhnature.
Answer:h TRUE
PagehRef:h Sectionh 1
3
BIO 3320Bio-chemistry Test bank
h h h
Contents
Chapterh1 IntroductionhtohBiochemistry 1
Chapterh2 Water 10
Chapterh3 AminohAcidshandhthehPrimaryhStructureshofhProteins 27
Chapterh4 Proteins:hThree-DimensionalhStructurehandhFunction 46
Chapterh5 PropertieshofhEnzymes 65
Chapterh6 MechanismshofhEnzymes 85
Chapterh7 CoenzymeshandhVitamins 104
Chapterh8 Carbohydrates 119
Chapterh9 LipidshandhMembranes 137
Chapterh10 IntroductionhtohMetabolism 153
Chapterh11 Glycolysis 169
Chapterh12 Gluconeogenesis,hThehPentosehPhosphatehPathway,
andhGlycogenhMetabolism 185
Chapterh13 ThehCitrichAcidhCycle 199
Chapterh14 ElectronhTransporthandhOxidativehPhosphorylation 213
Chapterh15 Photosynthesis 227
Chapterh16 LipidhMetabolism 241
Chapterh17 AminohAcidhMetabolism 256
Chapterh18 NucleotidehMetabolism 269
Chapterh19 NucleichAcids 284
Chapterh20 DNAhReplication,hRepair,handhRecombination 300
Chapterh21 TranscriptionhandhRNAhProcessing 315
Chapterh22 ProteinhSynthesis 330
Chapterh23 RecombinanthDNAhTechnology 348
, Bio-
chemistryhTesthbank
Chapter 1 Introduction to Biochemistry
h h h
1) Whichh elementshaccounth forh morehthanh97%h ofhthehweighth ofhmosthorganisms?
A) C,h H,hN,hMg,h O,h S
B) C,h H,hN,hO,h P,hS
C) C,h H,hN
D) Fe,hC,h H,hO,h P
E) Ca2+,h K+,h Na+,h Mg2+,h Cl-
Answer:h B
PagehRef:h Sectionh 2
2) Proteinshinhbiologicalh membranesh mayhbe
A) porous.
B) attachedh tohtheh membraneh surface.
C) spanh thehmembrane.
D) Allh ofhthehabove
E) BhandhChonly
Answer:h D
PagehRef:h Sectionh 3
3) Whichh statementh abouth cellulosehishfalse?
A) Ith ishthehmosthabundanth polysaccharideh inhnature.
B) Itshmonomersh arehjoinedh byhglycosidich bonds.
C) Ith ishpresenth inhthehstemshofhfloweringh plants.
D) Theh hydroxylh groupsh ofh neighboringh celluloseh moleculesh interacth tohformh strong,h insolubl
ehfibers.
E) Ith ishah branchedh polymerh ofhglucose.
Answer:h E
PagehRef:h Sectionh 3
1
, Bio-
chemistryhTesthbank
4) WhenhKeqhofhah reactionh=h1,hthen
A) thehforwardh reactionhish fasterh thanh theh reverseh reaction.
B) theh reverseh reactionhish fasterh thanh thehforwardh reaction.
C) thehforwardh andh reverseh reactionh ratehconstantsh areh equal.
D) moreh productshareh formedhthanh reactants.
E) fewerh productsh areh formedh thanh reactants.
Answer:h C
PagehRef:h Sectionh 4
5) Whichh statementh ishtruehabouth ah reactionhwithhanhequilibriumh constant,h Keq,h equalh toh1000?
A) Theh forwardh ratehconstanth ish1000h timeshgreaterh thanh thehreverseh ratehconstant.
B) Thehforwardh ratehconstanth ish3h timeshgreaterh thanh reverseh ratehconstant.
C) Theh forwardh rateh constanth ish1000h timesh smallerhthanh thehreverseh ratehconstant.
D) Theh forwardh ratehconstanth ish3h timeshsmallerhthanh thehreverseh ratehconstant.
E) Therehish noth enoughh informationh givenh tohcomparehthehforwardh andh reverseh ratehconstants.
Answer:h A
PagehRef:h Sectionh 4
6) Theh studyh ofhtheh energyh changesh duringh metabolich reactionsh ish called .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicalh heath dynamics
Answer:h D
PagehRef:h Sectionh 4
7) Ah spontaneoush chemicalh reactionhalwaysh hash a change.
A) positiveh Gibbʹsh freeh energy
B) negativeh Gibbʹsh freeh energy
C) positiveh enthalpy
D) negativehenthalpy
E) positiveh entropy
Answer:h B
PagehRef:h Sectionh 4
2
, Bio-
chemistryhTesthbank
8) Prokaryoteshareh valuablehtoolsh forh biochemistsh because
A) E.hcolihishwell-studiedh andhtypicalh ofh prokaryotes.
B) theyhcontainh ashmanyh genesh ash eukaryotich cells.
C) manyh ofhtheirh chromosomesh areh sequenced.
D) theyhareh noth veryh diversehorganisms.
E) Allh ofhthehabove
Answer:h C
PagehRef:h Sectionh 6
9) Whichh cellularh componenth carriesh outh oxidationh reactions,h someh ofh whichh produceh hydroge
nhperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:h A
PagehRef:h Sectionh 8
10) Whyhishith importanth thath theh enzymesh inhlysosomesh arehmorehactivehath acidich pHh thanh ath neutr
alhpH?
A) Sincehlysosomesh areh primarilyh foundh inhthehstomachhacidh ofhmammals,h theirh p
Hhdependenceh allowsh forh maximumhefficiencyhforh thehdigestionh ofhfoodstuffs.
B) Ith preventshtheirhdiffusionhouth ofhthehlysosomes.
C) Ith maximizesh thehinteractionh withhtheirh substratesh whichh areh alwaysh bases.
D) Ith preventsh themh fromh accidentallyh degradingh thehmacromoleculesh inhthehcytosol.
E) Ith allowsh forh regulationh ofhtheirhuptakeh byhthehmitochondria.
Answer:h D
PagehRef:h Sectionh 8
11) Moleculesh fromh livingh cellshcannoth behsynthesizedh outsideh ofhlivingh cell
s.hAnswer:h FALSE
PagehRef:h Sectionh 1
12) Fermentationh inhthehabsencehofhcellsh demonstratedh thath metabolich processesh werehchemicalh i
nhnature.
Answer:h TRUE
PagehRef:h Sectionh 1
3
