BIL 150 WITH CORRECT ANSWERS
2025
plasmodesmavinvplantvcellsvarevmostvsimilarvinvfunctionvtovwhichvofvthevfollowingvstructuresvinvani
malvcells?v-vcorrect-answersv-gapvjunctions
ofvthevfollowingvwhatvisvthevmostvlikelyvpathwayvtakenvbyvavnewlyvsynthesizedvproteinvthatvwillvbev
secretedvbyvanvanimalvcell?v-vcorrect-answersv-
ERv>vGolgiv>vvesiclesvthatvfusevwithvavcell'svplasmavmembrane
whichvofvthevfollowingvprocessesvwouldvlikelyvincludevallvothervprocesses?v-vcorrect-answersv-
passivevtransport
whichvofvthevfollowingvfactorsvwouldvmostvlikelyvleadvtovincreasevmembranevfluidity?v-vcorrect-
answersv-avgreatervproportionvofvunsaturatedvphospholipids
youvarevworkingvonvavteamvthatvisvdesigningvavnewvdrug.vInvordervforvthisvdrugvtovwork,vitvmustvent
ervthevcytoplasmvofvspecificvtargetvcells.vWhichvofvthevfollowingvwouldvbevavfactorvthatvmightvbestv
determinevwhethervyourvmoleculevcouldvselectivelyventervintovthesevtargetvcells?v-vcorrect-
answersv-avhighvhydrophobicityvofvthevdrugvmolecule
avpatientvhasvhadvavseriousvaccidentvandvlostvavlotvofvblood.vInvanvattemptvtovreplenishvbodyvfluids,v
anvequalvvolumevofvdistilledvwatervtovthevamountvofvbloodvlossvisvtransferredvdirectlyvintovonevofvh
,ervveins.vWhatvwillvbevthevmostvprobable?v-vcorrect-answersv-
thevpatient'svredvbloodvcellsvwillvswellvbecausevthevbloodvfluidvhasvbecomevhypotonicvcomparedvt
ovthevcells
whichvofvthevfollowingvmembranevactivitiesvrequiresvenergyvfromvATPvhydrolysis?v-vcorrect-
answersv-Na+vionsvmovingvoutvofvthevmammalianvcell
watervpassesvquicklyvthroughvmembranesvbecause?v-vcorrect-answersv-
itvmovesvthroughvaquaporinvproteinsvinvthevmembrane
whichvofvthevfollowingvisvavcharacteristicvfeaturevofvavcarriervproteinvinvavcellvmembrane?v-vcorrect-
answersv-itvexhibitsvavspecificityvforvavparticularvtypevofvmolecule
cellvmembranesvarevstructurallyvasymmetrical.vWhichvofvthevfollowingvmayvbevavmostvlikelyvexplan
ationvforvthisvasymmetry?v-vcorrect-answersv-
thevtwovsidesvofvavcellvmembranevfacevdifferentvenvironmentsvandvmayvcarryvoutvdifferentvfunctio
nsvonveachvside
accordingvtovthevfluidvmosaicvmodelvofvcellvmembranes,vwhichvofvthevfollowingvisvavcorrectvstatem
entvaboutvthevcellvmembranevphospholipids?v-vcorrect-answersv-
theyvmayvmovevlaterallyvalongvthevplanevofvthevmembrane
ifvavpharmaceuticalvcompanyvwishesvtovdesignvavdrugvtovblockvthevinteractionvbetweenvavG-
proteinvreceptorvandvanvintracellularvG-
protein,vthenvtheirvdrugvshouldvbestvblockvwhichvofvthevfollowing?v-vcorrect-answersv-
thevbindingvsitevofvthevG-proteinvcoupledvreceptorvforvthevG-protein
invresearchvonvagingv(bothvcellularvagingvandvorganismalvaging),vitvhasvbeenvfoundvthatvagedvcellsv
dovnotvprogressvthroughvthevcellvcyclevasvtheyvhadvpreviously.vWhichvofvthevfollowingvwouldvprovi
devevidencevthatvthisvisvrelatedvtovcellvsignaling?v-vcorrect-answersv-
growthvfactorvsignalsvdovnotvbindvasvefficientlyvtovtheirvreceptorsvasvpreviously
, GTPasevactivityvisvinvolvedvinvthevregulationvofvsignalvtransductionvbecausevit?v-vcorrect-answersv-
hydrolyzesvthevGTPvboundvtovavG-protein
atvpuberty,vanvadolescentvfemalevbodyvchangesvinvbothvstructurevandvfunctionvofvseveralvorganvsy
stems,vprimarilyvundervthevinfluencevofvchangingvconcentrationsvofvestrogensvandvothervsteroidvh
ormones.vHowvcanvonevhormone,vsuchvasvestrogen,vmediatevsovmanyveffects?v-vcorrect-answersv-
becausevestrogenvbindsvtovspecificvreceptorsvonvmanyvdifferentvkindsvofvcells,veachvwhichvmayvhav
evdifferentvresponsesvtovitsvbinding
signalvmoleculesvcanvresultvinvavphosphorylationvcascadevby?v-vcorrect-answersv-
initiatingvconformationalvchangesvinvavseriesvofvmanyvdifferentvproteins
ifvanvenzymevisvaddedvtovavsolutionvwherevthevsubstratevandvproductvofvitsvreactionvarevinvequilibri
um,vwhatvwillvoccur?v-vcorrect-answersv-nothing,vthevreactionvwillvstayvatvequilibrium
choosevthevpairvofvtermsvbelowvthatvcorrectlyvcorrelatesvwithvthisvsentence:vcatabolismvisvtovanab
olismvasv_________visvtov_________v-vcorrect-answersv-exergonic,vendergonic
duringvavchemicalvreaction,vyouvdeterminevthatvthevconversionvofvAvtovBvbyvanvenzymevhasvavfreeve
nergyvchangevofv-
20vkcal/mol.vIfvyouvdoublevthevamountvofvenzymevinvthevreaction,vwhatvwillvbevthevfreevenergyvcha
ngevforvthevnewvreaction?v-vcorrect-answersv--20vkcal/mol
invglycolysis,vforveachvmoleculevofvglucosevoxidizedvtovpyruvate?v-vcorrect-answersv-
twovmoleculesvofvATPvarevconsumedvandvfourvmoleculesvofvATPvarevproduced
avprimaryvfunctionvofvthev"shuttles"vinvaerobicvcellularvrespirationvseemsvtovbe?v-vcorrect-
answersv-
transfervcapturedvelectronvenergyvintovthevmitochondriavforvusevinvelectronvtransfervchain
2025
plasmodesmavinvplantvcellsvarevmostvsimilarvinvfunctionvtovwhichvofvthevfollowingvstructuresvinvani
malvcells?v-vcorrect-answersv-gapvjunctions
ofvthevfollowingvwhatvisvthevmostvlikelyvpathwayvtakenvbyvavnewlyvsynthesizedvproteinvthatvwillvbev
secretedvbyvanvanimalvcell?v-vcorrect-answersv-
ERv>vGolgiv>vvesiclesvthatvfusevwithvavcell'svplasmavmembrane
whichvofvthevfollowingvprocessesvwouldvlikelyvincludevallvothervprocesses?v-vcorrect-answersv-
passivevtransport
whichvofvthevfollowingvfactorsvwouldvmostvlikelyvleadvtovincreasevmembranevfluidity?v-vcorrect-
answersv-avgreatervproportionvofvunsaturatedvphospholipids
youvarevworkingvonvavteamvthatvisvdesigningvavnewvdrug.vInvordervforvthisvdrugvtovwork,vitvmustvent
ervthevcytoplasmvofvspecificvtargetvcells.vWhichvofvthevfollowingvwouldvbevavfactorvthatvmightvbestv
determinevwhethervyourvmoleculevcouldvselectivelyventervintovthesevtargetvcells?v-vcorrect-
answersv-avhighvhydrophobicityvofvthevdrugvmolecule
avpatientvhasvhadvavseriousvaccidentvandvlostvavlotvofvblood.vInvanvattemptvtovreplenishvbodyvfluids,v
anvequalvvolumevofvdistilledvwatervtovthevamountvofvbloodvlossvisvtransferredvdirectlyvintovonevofvh
,ervveins.vWhatvwillvbevthevmostvprobable?v-vcorrect-answersv-
thevpatient'svredvbloodvcellsvwillvswellvbecausevthevbloodvfluidvhasvbecomevhypotonicvcomparedvt
ovthevcells
whichvofvthevfollowingvmembranevactivitiesvrequiresvenergyvfromvATPvhydrolysis?v-vcorrect-
answersv-Na+vionsvmovingvoutvofvthevmammalianvcell
watervpassesvquicklyvthroughvmembranesvbecause?v-vcorrect-answersv-
itvmovesvthroughvaquaporinvproteinsvinvthevmembrane
whichvofvthevfollowingvisvavcharacteristicvfeaturevofvavcarriervproteinvinvavcellvmembrane?v-vcorrect-
answersv-itvexhibitsvavspecificityvforvavparticularvtypevofvmolecule
cellvmembranesvarevstructurallyvasymmetrical.vWhichvofvthevfollowingvmayvbevavmostvlikelyvexplan
ationvforvthisvasymmetry?v-vcorrect-answersv-
thevtwovsidesvofvavcellvmembranevfacevdifferentvenvironmentsvandvmayvcarryvoutvdifferentvfunctio
nsvonveachvside
accordingvtovthevfluidvmosaicvmodelvofvcellvmembranes,vwhichvofvthevfollowingvisvavcorrectvstatem
entvaboutvthevcellvmembranevphospholipids?v-vcorrect-answersv-
theyvmayvmovevlaterallyvalongvthevplanevofvthevmembrane
ifvavpharmaceuticalvcompanyvwishesvtovdesignvavdrugvtovblockvthevinteractionvbetweenvavG-
proteinvreceptorvandvanvintracellularvG-
protein,vthenvtheirvdrugvshouldvbestvblockvwhichvofvthevfollowing?v-vcorrect-answersv-
thevbindingvsitevofvthevG-proteinvcoupledvreceptorvforvthevG-protein
invresearchvonvagingv(bothvcellularvagingvandvorganismalvaging),vitvhasvbeenvfoundvthatvagedvcellsv
dovnotvprogressvthroughvthevcellvcyclevasvtheyvhadvpreviously.vWhichvofvthevfollowingvwouldvprovi
devevidencevthatvthisvisvrelatedvtovcellvsignaling?v-vcorrect-answersv-
growthvfactorvsignalsvdovnotvbindvasvefficientlyvtovtheirvreceptorsvasvpreviously
, GTPasevactivityvisvinvolvedvinvthevregulationvofvsignalvtransductionvbecausevit?v-vcorrect-answersv-
hydrolyzesvthevGTPvboundvtovavG-protein
atvpuberty,vanvadolescentvfemalevbodyvchangesvinvbothvstructurevandvfunctionvofvseveralvorganvsy
stems,vprimarilyvundervthevinfluencevofvchangingvconcentrationsvofvestrogensvandvothervsteroidvh
ormones.vHowvcanvonevhormone,vsuchvasvestrogen,vmediatevsovmanyveffects?v-vcorrect-answersv-
becausevestrogenvbindsvtovspecificvreceptorsvonvmanyvdifferentvkindsvofvcells,veachvwhichvmayvhav
evdifferentvresponsesvtovitsvbinding
signalvmoleculesvcanvresultvinvavphosphorylationvcascadevby?v-vcorrect-answersv-
initiatingvconformationalvchangesvinvavseriesvofvmanyvdifferentvproteins
ifvanvenzymevisvaddedvtovavsolutionvwherevthevsubstratevandvproductvofvitsvreactionvarevinvequilibri
um,vwhatvwillvoccur?v-vcorrect-answersv-nothing,vthevreactionvwillvstayvatvequilibrium
choosevthevpairvofvtermsvbelowvthatvcorrectlyvcorrelatesvwithvthisvsentence:vcatabolismvisvtovanab
olismvasv_________visvtov_________v-vcorrect-answersv-exergonic,vendergonic
duringvavchemicalvreaction,vyouvdeterminevthatvthevconversionvofvAvtovBvbyvanvenzymevhasvavfreeve
nergyvchangevofv-
20vkcal/mol.vIfvyouvdoublevthevamountvofvenzymevinvthevreaction,vwhatvwillvbevthevfreevenergyvcha
ngevforvthevnewvreaction?v-vcorrect-answersv--20vkcal/mol
invglycolysis,vforveachvmoleculevofvglucosevoxidizedvtovpyruvate?v-vcorrect-answersv-
twovmoleculesvofvATPvarevconsumedvandvfourvmoleculesvofvATPvarevproduced
avprimaryvfunctionvofvthev"shuttles"vinvaerobicvcellularvrespirationvseemsvtovbe?v-vcorrect-
answersv-
transfervcapturedvelectronvenergyvintovthevmitochondriavforvusevinvelectronvtransfervchain
