Bio-chemistrydTestd bank
BIO 3320Bio-chemistry Test bank
d d d
Contents
Chapterd1 IntroductiondtodBiochemistry 1
Chapterd2 Water 10
Chapterd3 AminodAcidsdanddthedPrimarydStructuresdofdProteins 27
Chapterd4 Proteins:dThree-DimensionaldStructuredanddFunction 46
Chapterd5 PropertiesdofdEnzymes 65
Chapterd6 MechanismsdofdEnzymes 85
Chapterd7 CoenzymesdanddVitamins 104
Chapterd8 Carbohydrates 119
Chapterd9 LipidsdanddMembranes 137
Chapterd10 IntroductiondtodMetabolism 153
Chapterd11 Glycolysis 169
Chapterd12 Gluconeogenesis,dThedPentosedPhosphatedPathway,
anddGlycogendMetabolism 185
Chapterd13 ThedCitricdAciddCycle 199
Chapterd14 ElectrondTransportdanddOxidativedPhosphorylation 213
Chapterd15 Photosynthesis 227
Chapterd16 LipiddMetabolism 241
Chapterd17 AminodAciddMetabolism 256
Chapterd18 NucleotidedMetabolism 269
Chapterd19 NucleicdAcids 284
Chapterd20 DNAdReplication,dRepair,danddRecombination 300
Chapterd21 TranscriptiondanddRNAdProcessing 315
Chapterd22 ProteindSynthesis 330
Chapterd23 RecombinantdDNAdTechnology 348
, Bio-chemistrydTestd bank
Chapter 1 Introduction to Biochemistry
d d d
1) Whichdelementsdaccountd ford moredthand97%d ofdthedweightd ofdmostdorganisms?
A) C,d H,dN,dMg,dO,d S
B) C,d H,dN,dO,dP,dS
C) C,dH,dN
D) Fe,dC,d H,dO,d P
E) Ca2+,d K+,d Na+,d Mg2+,d Cl-
Answer:d B
PagedRef:d Sectiond 2
2) Proteinsdindbiologicaldmembranesd maydbe
A) porous.
B) attacheddtodthedmembraned surface.
C) spand thedmembrane.
D) Alld ofdthedabove
E) BdanddCdonly
Answer:d D
PagedRef:d Sectiond 3
3) Whichdstatementdaboutd cellulosedisdfalse?
A) Itdisdthedmostdabundantd polysaccharidedindnature.
B) Itsdmonomersd aredjoinedd bydglycosidicd bonds.
C) Itdisdpresentd indthedstemsdofdfloweringd plants.
D) Thedhydroxyldgroupsd ofdneighboringdcellulosedmoleculesdinteractdtodformdstrong,dinsoluble
dfibers.
E) Itdisdad branchedd polymerd ofdglucose.
Answer:d E
PagedRef:d Sectiond 3
1
, Bio-chemistrydTestd bank
4) WhendKeqdofdadreactiond=d1,dthen
A) thedforwardd reactiondisdfasterdthand thedreversed reaction.
B) thedreversed reactiondisdfasterd thand thedforwardd reaction.
C) thedforwarddandd reversed reactiondratedconstantsdared equal.
D) mored productsdaredformeddthand reactants.
E) fewerd productsdaredformeddthand reactants.
Answer:d C
PagedRef:d Sectiond 4
5) Whichdstatementdisdtruedaboutd ad reactiondwithdandequilibriumdconstant,d Keq,dequald tod1000?
A) Thedforwarddratedconstantd isd1000dtimesdgreaterd thand thedreversedratedconstant.
B) Thedforwarddratedconstantd isd3d timesdgreaterd thand reversed ratedconstant.
C) Thedforwarddratedconstantd isd1000dtimesdsmallerdthandthedreversed ratedconstant.
D) Thedforwarddratedconstantd isd3d timesdsmallerdthand thedreversedratedconstant.
E) Theredisdnotd enoughd informationd givendtodcomparedthedforwarddandd reversed ratedconstants.
Answer:d A
PagedRef:d Sectiond 4
6) Thedstudyd ofdthed energydchangesd duringd metabolicdreactionsd isdcalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicaldheatd dynamics
Answer:d D
PagedRef:d Sectiond 4
7) Adspontaneousd chemicald reactiondalwaysd hasd a change.
A) positivedGibbʹsdfreedenergy
B) negativedGibbʹsdfreed energy
C) positivedenthalpy
D) negativedenthalpy
E) positivedentropy
Answer:d B
PagedRef:d Sectiond 4
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, Bio-chemistrydTestd bank
8) Prokaryotesdared valuabledtoolsd ford biochemistsdbecause
A) E.dcolidisdwell-studiedd anddtypicaldofdprokaryotes.
B) theydcontaind asdmanydgenesdasd eukaryoticdcells.
C) manydofdtheirdchromosomesd aredsequenced.
D) theydarednotd veryddiversedorganisms.
E) Alld ofdthedabove
Answer:d C
PagedRef:d Sectiond 6
9) Whichdcellulardcomponentdcarriesdoutdoxidationdreactions,dsomedofdwhichdproducedhydrogen
dperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:d A
PagedRef:d Sectiond 8
10) Whydisditdimportantdthatdthedenzymesdindlysosomesdaredmoredactivedatdacidicd pHdthandatdneutr
aldpH?
A) Sincedlysosomesdaredprimarilydfounddindthedstomachdaciddofdmammals,dtheirdp
Hddependencedallowsdfordmaximumdefficiencydfordtheddigestiondofdfoodstuffs.
B) Itd preventsdtheirddiffusiondoutdofdthedlysosomes.
C) Itdmaximizesdthedinteractiond withdtheird substratesd whichd aredalwaysd bases.
D) Itd preventsdthemd fromdaccidentallyddegradingd thedmacromoleculesd indthedcytosol.
E) Itd allowsd ford regulationd ofdtheirduptaked bydthedmitochondria.
Answer:d D
PagedRef:d Sectiond 8
11) Moleculesdfromdlivingdcellsdcannotd bedsynthesizedd outsidedofdlivingd cells
.dAnswer:d FALSE
PagedRef:d Sectiond 1
12) Fermentationdindthedabsencedofdcellsddemonstrateddthatd metabolicdprocessesdweredchemicaldi
ndnature.
Answer:d TRUE
PagedRef:d Sectiond 1
3
BIO 3320Bio-chemistry Test bank
d d d
Contents
Chapterd1 IntroductiondtodBiochemistry 1
Chapterd2 Water 10
Chapterd3 AminodAcidsdanddthedPrimarydStructuresdofdProteins 27
Chapterd4 Proteins:dThree-DimensionaldStructuredanddFunction 46
Chapterd5 PropertiesdofdEnzymes 65
Chapterd6 MechanismsdofdEnzymes 85
Chapterd7 CoenzymesdanddVitamins 104
Chapterd8 Carbohydrates 119
Chapterd9 LipidsdanddMembranes 137
Chapterd10 IntroductiondtodMetabolism 153
Chapterd11 Glycolysis 169
Chapterd12 Gluconeogenesis,dThedPentosedPhosphatedPathway,
anddGlycogendMetabolism 185
Chapterd13 ThedCitricdAciddCycle 199
Chapterd14 ElectrondTransportdanddOxidativedPhosphorylation 213
Chapterd15 Photosynthesis 227
Chapterd16 LipiddMetabolism 241
Chapterd17 AminodAciddMetabolism 256
Chapterd18 NucleotidedMetabolism 269
Chapterd19 NucleicdAcids 284
Chapterd20 DNAdReplication,dRepair,danddRecombination 300
Chapterd21 TranscriptiondanddRNAdProcessing 315
Chapterd22 ProteindSynthesis 330
Chapterd23 RecombinantdDNAdTechnology 348
, Bio-chemistrydTestd bank
Chapter 1 Introduction to Biochemistry
d d d
1) Whichdelementsdaccountd ford moredthand97%d ofdthedweightd ofdmostdorganisms?
A) C,d H,dN,dMg,dO,d S
B) C,d H,dN,dO,dP,dS
C) C,dH,dN
D) Fe,dC,d H,dO,d P
E) Ca2+,d K+,d Na+,d Mg2+,d Cl-
Answer:d B
PagedRef:d Sectiond 2
2) Proteinsdindbiologicaldmembranesd maydbe
A) porous.
B) attacheddtodthedmembraned surface.
C) spand thedmembrane.
D) Alld ofdthedabove
E) BdanddCdonly
Answer:d D
PagedRef:d Sectiond 3
3) Whichdstatementdaboutd cellulosedisdfalse?
A) Itdisdthedmostdabundantd polysaccharidedindnature.
B) Itsdmonomersd aredjoinedd bydglycosidicd bonds.
C) Itdisdpresentd indthedstemsdofdfloweringd plants.
D) Thedhydroxyldgroupsd ofdneighboringdcellulosedmoleculesdinteractdtodformdstrong,dinsoluble
dfibers.
E) Itdisdad branchedd polymerd ofdglucose.
Answer:d E
PagedRef:d Sectiond 3
1
, Bio-chemistrydTestd bank
4) WhendKeqdofdadreactiond=d1,dthen
A) thedforwardd reactiondisdfasterdthand thedreversed reaction.
B) thedreversed reactiondisdfasterd thand thedforwardd reaction.
C) thedforwarddandd reversed reactiondratedconstantsdared equal.
D) mored productsdaredformeddthand reactants.
E) fewerd productsdaredformeddthand reactants.
Answer:d C
PagedRef:d Sectiond 4
5) Whichdstatementdisdtruedaboutd ad reactiondwithdandequilibriumdconstant,d Keq,dequald tod1000?
A) Thedforwarddratedconstantd isd1000dtimesdgreaterd thand thedreversedratedconstant.
B) Thedforwarddratedconstantd isd3d timesdgreaterd thand reversed ratedconstant.
C) Thedforwarddratedconstantd isd1000dtimesdsmallerdthandthedreversed ratedconstant.
D) Thedforwarddratedconstantd isd3d timesdsmallerdthand thedreversedratedconstant.
E) Theredisdnotd enoughd informationd givendtodcomparedthedforwarddandd reversed ratedconstants.
Answer:d A
PagedRef:d Sectiond 4
6) Thedstudyd ofdthed energydchangesd duringd metabolicdreactionsd isdcalled .
A) bioinformatics
B) metabodynamics
C) thermometrics
D) bioenergetics
E) biologicaldheatd dynamics
Answer:d D
PagedRef:d Sectiond 4
7) Adspontaneousd chemicald reactiondalwaysd hasd a change.
A) positivedGibbʹsdfreedenergy
B) negativedGibbʹsdfreed energy
C) positivedenthalpy
D) negativedenthalpy
E) positivedentropy
Answer:d B
PagedRef:d Sectiond 4
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, Bio-chemistrydTestd bank
8) Prokaryotesdared valuabledtoolsd ford biochemistsdbecause
A) E.dcolidisdwell-studiedd anddtypicaldofdprokaryotes.
B) theydcontaind asdmanydgenesdasd eukaryoticdcells.
C) manydofdtheirdchromosomesd aredsequenced.
D) theydarednotd veryddiversedorganisms.
E) Alld ofdthedabove
Answer:d C
PagedRef:d Sectiond 6
9) Whichdcellulardcomponentdcarriesdoutdoxidationdreactions,dsomedofdwhichdproducedhydrogen
dperoxide?
A) peroxisomes
B) mitochondria
C) chloroplasts
D) lysosomes
E) vacuoles
Answer:d A
PagedRef:d Sectiond 8
10) Whydisditdimportantdthatdthedenzymesdindlysosomesdaredmoredactivedatdacidicd pHdthandatdneutr
aldpH?
A) Sincedlysosomesdaredprimarilydfounddindthedstomachdaciddofdmammals,dtheirdp
Hddependencedallowsdfordmaximumdefficiencydfordtheddigestiondofdfoodstuffs.
B) Itd preventsdtheirddiffusiondoutdofdthedlysosomes.
C) Itdmaximizesdthedinteractiond withdtheird substratesd whichd aredalwaysd bases.
D) Itd preventsdthemd fromdaccidentallyddegradingd thedmacromoleculesd indthedcytosol.
E) Itd allowsd ford regulationd ofdtheirduptaked bydthedmitochondria.
Answer:d D
PagedRef:d Sectiond 8
11) Moleculesdfromdlivingdcellsdcannotd bedsynthesizedd outsidedofdlivingd cells
.dAnswer:d FALSE
PagedRef:d Sectiond 1
12) Fermentationdindthedabsencedofdcellsddemonstrateddthatd metabolicdprocessesdweredchemicaldi
ndnature.
Answer:d TRUE
PagedRef:d Sectiond 1
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