BIOLOGY 190L FINAL EXAM
QUESTIONS AND CORRECT ANSWERS
Massa-aans--
theaamountaofamatterainasomething.aMassaisatheapropertyaofaaasubstanceathatagivesaitainer
tiaa(kg)a(g)
Lengtha-aans--
Theadistanceabetweenatwoapoints.aTheabasicaunitaofameasureaofalengthaisatheameter(m)
Volumea-aans--
Theaamountaofaspaceaoccupiedabyasomething.aTheabasicaunitaofameasureaisathealitera(l)
ScientificaNotationa-aans--2.78axa10^2a=a278
kilograma-aans--kg,aoneathousandagrams
Avogadro'sanumbera-aans--6.02axa10^23
MoSa-aans--vol(liters)xaMa(molesaperaliter)axaMWa(gramsaperamole)
Percentasolutionsa-aans--%asolutionsa=agramsaofasolutea/a100amL
Stockasolutionsa-aans--C1V1=C2V2
Acidicasolutiona-aans--pH<a7
Basicasolutiona-aans--pH>7
pHaequationa-aans--pHa=a-log[H+]
example:aH+a=a10^-7
pH=-log(10^-7)=a-(-7)=7awhichawouldabeaneutral
Whataisatheabasicaunitaofamassa?a-aans--Kilograma(kg)
Molaritya(m)aisaexpressedabya?a-aans--mol/L
Usingascientificanotation,aconverta1auLa(microliter)atoatheaappropriateavolumeainaLa(liters).a
-aans--1.0x10^-6aL
WhataisatheaconcentrationaofaOH-a([OH-])aforaaasolutionaatapHa6.0?a-aans--10^-8aM
WhichaofatheafollowingaisamostaaccurateaatameasuringasmallavolumesasuchaasauLa(microlit
ers)?a-aans--Micropipettes
, Howamanyagramsaofaglucoseadoayouaneedatoapreparea50amLaofa15%aglucoseasolution?a-
aans--7.5ag
Sodaaisaaabasea-aans--False
BeakersaandaErlenmeyeraFlasksa-aans--
areaapproximateaandaserveaasareferenceapointsaonly
Graduatedacylinderaandapipettea-aans--performaaccurateameasuring
Whenatoauseapipettes,abeakers,aErlenmeyeraflasksa,aandagraduatedacylindersa-aans--
useatoameasureatheavolumesaofawater
Howatoadetermineatheavolumeainaaaserologicalapipettesaandagraduatedacylindersa-aans--
Readatheabottomaofatheameniscusaataeyealevel
Howatoauseaaamicropipettea-aans--
Byadepressingatheaplungeratoatheafirstastopapointaandaplacingatheatipainathealiquidaandaslow
lyareleasingatheaplunger,atheaexactaamountatoabeatransferredacanabeadrawnaupaintoatheatip
.aToaexpelathisavolume,adepressatheaplungeratoatheasecondastopapoint.
Whenausingaaaserologicalapipetteaoragraduatedacylinder,awhichaofatheafollowingaisatheacorr
ectawayatoareadatheameasuredavolume?a-aans--Atatheabottomaofatheameniscusaataeyealevel
Aap-valueaof<a0.05a-aans--
meansatheadifferenceabetweenagroupsaisastatisticallyasignificant.
HowamanyauLa(microliters)aina580amL?a-aans--580,000auL
Howadoayouapreparea340amLaofaaa4aMasolutionafromaaa20aMastockasolutiona(i.e.ahowamuch
astockasolutionadoayouaneed)?a-aans--340mL
Howamuchawateraisaneededatoapreparea340amLaofaaa4aMasolutionafromaaa20aMastockasoluti
on?a-aans--272amL
Theaerrorabarsaweacreatedainatheabar/columnagrapha(usingaExceladuringachaptera3alab)are
presentawhichaofatheafollowing?a-aans--Standardadevation
Whichaofatheafollowingamaterialsashouldayouauseatoacleanathealensesaonaaamicroscope?a-
aans--kleenex
Ifatheatotalamagnificationaofayouraspecimenaisa100Xaandayouaareausingaaa10Xaeyepiece,aw
hataisatheamagnificationaofayouraobjective?a-aans--10x
QUESTIONS AND CORRECT ANSWERS
Massa-aans--
theaamountaofamatterainasomething.aMassaisatheapropertyaofaaasubstanceathatagivesaitainer
tiaa(kg)a(g)
Lengtha-aans--
Theadistanceabetweenatwoapoints.aTheabasicaunitaofameasureaofalengthaisatheameter(m)
Volumea-aans--
Theaamountaofaspaceaoccupiedabyasomething.aTheabasicaunitaofameasureaisathealitera(l)
ScientificaNotationa-aans--2.78axa10^2a=a278
kilograma-aans--kg,aoneathousandagrams
Avogadro'sanumbera-aans--6.02axa10^23
MoSa-aans--vol(liters)xaMa(molesaperaliter)axaMWa(gramsaperamole)
Percentasolutionsa-aans--%asolutionsa=agramsaofasolutea/a100amL
Stockasolutionsa-aans--C1V1=C2V2
Acidicasolutiona-aans--pH<a7
Basicasolutiona-aans--pH>7
pHaequationa-aans--pHa=a-log[H+]
example:aH+a=a10^-7
pH=-log(10^-7)=a-(-7)=7awhichawouldabeaneutral
Whataisatheabasicaunitaofamassa?a-aans--Kilograma(kg)
Molaritya(m)aisaexpressedabya?a-aans--mol/L
Usingascientificanotation,aconverta1auLa(microliter)atoatheaappropriateavolumeainaLa(liters).a
-aans--1.0x10^-6aL
WhataisatheaconcentrationaofaOH-a([OH-])aforaaasolutionaatapHa6.0?a-aans--10^-8aM
WhichaofatheafollowingaisamostaaccurateaatameasuringasmallavolumesasuchaasauLa(microlit
ers)?a-aans--Micropipettes
, Howamanyagramsaofaglucoseadoayouaneedatoapreparea50amLaofa15%aglucoseasolution?a-
aans--7.5ag
Sodaaisaaabasea-aans--False
BeakersaandaErlenmeyeraFlasksa-aans--
areaapproximateaandaserveaasareferenceapointsaonly
Graduatedacylinderaandapipettea-aans--performaaccurateameasuring
Whenatoauseapipettes,abeakers,aErlenmeyeraflasksa,aandagraduatedacylindersa-aans--
useatoameasureatheavolumesaofawater
Howatoadetermineatheavolumeainaaaserologicalapipettesaandagraduatedacylindersa-aans--
Readatheabottomaofatheameniscusaataeyealevel
Howatoauseaaamicropipettea-aans--
Byadepressingatheaplungeratoatheafirstastopapointaandaplacingatheatipainathealiquidaandaslow
lyareleasingatheaplunger,atheaexactaamountatoabeatransferredacanabeadrawnaupaintoatheatip
.aToaexpelathisavolume,adepressatheaplungeratoatheasecondastopapoint.
Whenausingaaaserologicalapipetteaoragraduatedacylinder,awhichaofatheafollowingaisatheacorr
ectawayatoareadatheameasuredavolume?a-aans--Atatheabottomaofatheameniscusaataeyealevel
Aap-valueaof<a0.05a-aans--
meansatheadifferenceabetweenagroupsaisastatisticallyasignificant.
HowamanyauLa(microliters)aina580amL?a-aans--580,000auL
Howadoayouapreparea340amLaofaaa4aMasolutionafromaaa20aMastockasolutiona(i.e.ahowamuch
astockasolutionadoayouaneed)?a-aans--340mL
Howamuchawateraisaneededatoapreparea340amLaofaaa4aMasolutionafromaaa20aMastockasoluti
on?a-aans--272amL
Theaerrorabarsaweacreatedainatheabar/columnagrapha(usingaExceladuringachaptera3alab)are
presentawhichaofatheafollowing?a-aans--Standardadevation
Whichaofatheafollowingamaterialsashouldayouauseatoacleanathealensesaonaaamicroscope?a-
aans--kleenex
Ifatheatotalamagnificationaofayouraspecimenaisa100Xaandayouaareausingaaa10Xaeyepiece,aw
hataisatheamagnificationaofayouraobjective?a-aans--10x
