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WGU C785 Biochemistry Unit Questions/exam with correct answers verified 100%
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WGU C785 Biochemistry
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WGU C785 Biochemistry
WGU C785 Biochemistry Unit Questions/exam with correct answers verified 100%WGU C785 Biochemistry Unit Questions/exam with correct answers verified 100%
Which level of protein structure is disrupted through the hydrolysis of peptide bonds?
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WGU C785 Biochemistry Unit Questions/
ng ng ng ng
exam with correct answers verified 100%
ng ng ng ng ng
Whichnglevelngofngproteinngstructurengisngdisruptedngthroughngthenghydrolysisngofngpeptidengbonds?
Quaternary
Tertiary
Primary
Secondaryng-ngcorrectnganswers-Primary
Thengprimaryngstructurengofngangproteinngisngthengsequencengofngaminongacidsngheldngtogetherngbyngpeptidengbon
ds.ngPeptidengbondsngarengformedngbyngdehydrationngreactionsngandngdisruptedngbynghydrolysis.
Angmutationnginngthengbeta-
hemoglobinnggene,ngwhichngresultsnginngthengreplacementngofngthengaminongacidngglutamatenginngpositionng6ngwi
thngthengaminongacidngvaline,ngleadsngtongthengdevelopmentngofngsicklengcellnganemia.ngThengstructuresngofnggluta
matengandngvalinengarengshownngbelow.
Ifngthengbetanghemoglobinnggenenginngangpatientngwithngsickle-
cellnganemiangwerengtongbengeditedngsongthatngthengvalinenginngpositionng6ngwasngreplacedngwithngangdifferentngami
nongacid,ngwhichngreplacementngforngvalinengwouldngbengexpectedngtonghavengthengbestngclinicalngoutcome,nginngt
heory,ngforngthengpatient?ng(Assumengthengvalinengcanngpotentiallyngbengreplacedngwithnganyngaminongacidngother
ngthanngglutamate.)ng-ngcorrectnganswers-
Thengoriginalngaminongacidnginnganghealthyngpatientngisngglutamate,ngwhichngisngnegativelyngcharged.ngThengmutat
edngaminongacidngisngvaline,ngwhichngisngnon-
polar.ngValinengisngcausingngsicklengcellnganemia.ngThengbestngaminongacidngtongreplacengvalinengsongthatngthengpati
entngisnghealthyngagainngwouldngbengthengonengmostnglikengglutamate,ngsonganyngnegativelyngchargedngaminongaci
d.
Secondary,ngtertiary,ngandngquaternarynglevelsngofngproteinngstructurengcanngallngbengimpactedngbyngexposingngang
proteinngtongwhichngtreatment?
,Changengofnganghydrophobicngaminongacidngtongangdifferentnghydrophobicngaminongacid
Additionngofngangreducingngagent
PlacementngofngthengproteinnginngangsolutionngwithnganglowngpH
Increasenginngthengconcentrationngofngthengproteinnginngsolutionng-ngcorrectnganswers-
PlacementngofngthengproteinnginngangsolutionngwithnganglowngpH
ChangesnginngpHngaffectnghydrogenngbondsngandngionicngbonds.ngHydrogenngbondsnginngthengbackbonengofngamin
ongacidsngoccurnginngsecondaryngstructure,ngandngbothnghydrogenngbondsngandngionicngbondsngoccurnginngthengsid
engchainsngofngaminongacidsnginngtertiaryngstructure.
Anngincreasenginngbeta-
pleatedngsheetngstructurenginngsomengbrainngproteinsngcanngleadngtonganngincreasenginngamyloidngdepositngformat
ion,ngcharacteristicngofngsomengneurodegenerativengdiseases.ngWhatngisngthengprimaryngbiochemicalngprocessngt
hatngfollowsngthengincreasenginngbeta-
pleatedngsheetngstructurengthatngleadsngtongthengdevelopmentngofngthengamyloidngdeposits?
Anngincreasenginngglycogenngformationnginngthengbrainngcells
Aggregationngofngthengproteinsnginngthengbrain
Secretionngofngglucagon,ngleadingngtongexcessivengketogenesis
Anngincreasenginnganaerobicngmetabolismngofngglucosenginngthengbrainng-ngcorrectnganswers-
Aggregationngofngthengproteinsnginngthengbrain
Thisngquestionngisngdescribingngchangesnginngproteinngstructure.ngAggregationngoccursngwhenngproteinsngclumpng
togethernginappropriately,ngcausingngplaquesnglikengamyloidngdepositsngtongaccumulate.
Whichnglevelngofngproteinngstructurengisngdeterminedngbyngthengsequencengofngaminongacids?
Secondaryngstructure
,Quaternaryngstructure
Tertiaryngstructure
Primaryngstructureng-ngcorrectnganswers-Primaryngstructure
Thengprimaryngstructurengofngangproteinngisngsimplyngthengsequencengofngaminongacidsngheldngtogetherngbyngpepti
dengbonds.
Whichngforcengisngmostnginfluentialnginngdeterminingngthengsecondaryngstructurengofngangprotein?
Hydrophobicngeffect
Disulfidengbonding
Hydrogenngbonding
Electrostaticnginteractionsng-ngcorrectnganswers-Hydrogenngbonding
Thengsecondaryngstructurengofngangproteinngisngbuiltngbynghydrogenngbondsngbetweenngthengcarboxylnggroupsngan
dngaminonggroupsngonngthengbackbonesngofngthengaminongacids.
Whichngaminongacidngwouldngmostnglikelyngparticipatenginnghydrogenngbonds?ng-ngcorrectnganswers-
AminongAcidngstructureng4
Thisngisngangpolar,ngunchargedngaminongacidngduengtongthengOHnggroupngonngthengsidengchain.ngPolar,ngunchargedng
aminongacidsngcontainingngoxygenngorngNHnggroupsngmakenghydrogenngbonds.
Whichngportionngofngthengaminongacidngisnginsidengthengbox?
ng
ThengboxngisngsurroundingngthengsectionngbelowngthengAlphangCarbonng-ngcorrectnganswers-SidengChain
, Thengsidengchainngisngthengvariablenggroupngofngthengaminongacid,ngalsongcalledngthengRnggroup.ngEveryngaminongaci
dnghasngthengsamengaminonggroup,ngcarboxylicngacidnggroup,ngandnganngalphangcarbon,ngbutngthengsidengchainngisng
different.
Whichngpairngofngaminongacidsngwillngmostnglikelynginteractngthroughnghydrophobicngforcesngbetweenngtheirngside
ngchains?ng-ngcorrectnganswers-Bothngofngthesengaminongacidsngarengnon-
polarngandngthereforengcannginteractngtogetherngwithnganghydrophobicnginteraction.ngPleasengnotengthatngtheng"S
"nginngthengaminongacidngonngthengrightngisngnon-
polar,ngwhilengtheng"SH"nggroupnginnganswerngchoicengDngisngpolar.ngThengSngmustnghavenganngHngtongbengpolarngandng
isngotherwisengnon-polar.
Whichngportionngofngthengaminongacidngisnginsidengthengbox?
ThengboxngisngoverngthengCarbonngatngthengCenterngofngthengchainng-ngcorrectnganswers-AlphangCarbon
Thengalphangcarbonngisngthengcentralngcarbonngonnganngaminongacidngthatngholdsngtogetherngthengothernggroupsngo
fngthengaminongacid.ngItngisngalwaysngattachedngtongthengaminonggroup,ngthengcarboxylnggroup,ngthengsidengchain,nga
ndngangsinglenghydrogen.ngItngisngpartngofngthengbackbonengofngthengaminongacidngandngisngfoundnginngeveryngaminong
acid.
Givenngthengfollowingngaminongacidngstructure,ngwhatngisngthengstrongestngintermolecularngforcengitngwouldngpart
icipatenginngtongstabilizengangproteinngstructure?
Ionicngbond
Disulfidengbond
Hydrogenngbond
Hydrophobicnginteractionng-ngcorrectnganswers-Hydrophobicnginteraction
ThengaminongacidngpicturedngonlynghasngCHnggroupsnginngitsngsidengchain,ngandngthereforengisngnon-polar.ngNon-
polarngaminongacidsngmakenghydrophobicnginteractions.
Whichngchangengwouldngmostnglikelyngresultnginngangpermanentngmodificationngofnganngexpressedngprotein'sngfun
ction?