TEAS practice test (science portion) Questions And Answers

TEAS practice test (science portion)
Questions And Answers
___aareaataaahigherataxonomicalevelaofaorganizationathana___

a)aorgans,aorganasystem
b)acells,amolecules
c)aatoms,amolecules
d)atissues,aorgansa-aCORRECTaaANSWER-Cells;amolecules

2aoramoreatissueatypesaworkatogetheratoaperformaaaspecificafunctionaatawhatalevel?a-
aCORRECTaaANSWER-Theaorganalevel




2areasonsaforaconductingascientificainvestigationsa-aCORRECTaaANSWER-
Establishingaprocedures.aInvolvingaqualityaofalife.

235aUa-->aXa+a4aHea92a2
Whichaofatheafollowingaisa"x"ainatheareactionaabove?a
a)a239aPua94
b)a231aPua94
c)a231aTha90
d)a239aTha90a-aCORRECTaaANSWER-231aTha90
Lookaforanumbersathatacorrectlyaadaupatoatheanumberaonatheaoppositeasideaofatheareactiona
231+4a=a235
90+2a=a92
Inanaturaladecayaofaradioisotopeauraniuma235,auraniumalosesa2aprotonsaanda4amassaunits,at
heaatomicanumberaisareducedabya2aandatheamassanumberaisareducedabya4.acorrespondingat
oathoriuma231

4aHea+a14aN-->a17aOa+aX
Whichaofatheafollowingaoptionsafora"x"ainatheanuclearareactionaabove?
a)a1Ha1
b)a18aFa9
c)a3Ha1
d)a1aNa0a-aCORRECTaaANSWER-1aHa1a
Explanation:a1a+a7a=a8
4a+a14a=a16,a16a+a1a=a17
Theaprotonaandaneutronacomplementaisaequal,arequiredabyalawaofaconservationaofamassaan
dacharge

,Aacellausesawhichaofatheafollowingaasatheafirst-
lineaofadefenseaagainstamutationsaduringaDNAareplication?
a)acelladeath
b)aexcisionarepair
c)amismatcharepair
d)aDNAapolymeraseaproofreadinga-aCORRECTaaANSWER-DNAapolymeraseaproofreading

Aacertainadiseaseaisacarriedaonatheaallelea(a)awhichaisarecessiveatoatheanormalaconditiona(A)
.aIfaaanormala(AA)amaleameetawithaaafemaleawhoahasatheadiseasea(aa),awhataisatheapercenta
geaofaoffspringathataareacarriersaofatheadisease?
a)a0%
b)a25%
c)a75%
d)a100%a-aCORRECTaaANSWER-100%

Aachemicalabondingaofaatomsathatapossessesaitsaownacharacteristicsaindependentaofatheaat
omsathemselvesa-aCORRECTaaANSWER-Molecule

AadrugathatastopsatheafunctionaofageneticacodeafromaDNAapolymeraseawould:a
a)aslowatheatranscriptionaofageneticacodeafromaDNAatoamessengeraRNA
b)ahinderathearateaofabindingaofatransferaRNAaanticodonsatoamessengeraRNAacodons
c)apreventaformationaofapeptideabondsabetweenatheaaminoaacidsaofatheagrowingaproteinamo
lecule
d)ablockatheareplicationaofaDNAacarryingatheageneticacodeainatheanucleusa-
aCORRECTaaANSWER-blockatheareplicationaofaDNAacarryingatheageneticacodeainanucleus




DNAapolymeraseainatheaenzymeathatacopiesaDNA

Aaharmfulaexampleaofaaacatalyticareactionainvolvesatheabreakdownaofaozoneabyauseaof____
___
a)achlorineaions
b)afluorineaions
c)amanganeseadioxide
d)arhodiuma-aCORRECTaaANSWER-Chlorineaions

Aalargeasaturatedahydrocarbonawillacontaina___a

a)atheasameanumberaofahydrocarbon
b)aexactlyatwiceaasamanyahydrogenaatomsaasacarbonaatoms
c)alessathanatwiceaasamanyahydrogenaatomsaasacarbonaatoms
d)amoreathanatwiceaasamanyahydrogenaatomsaasacarbonaatomsa-aCORRECTaaANSWER-
Moreathanatwiceaasamanyahydrogenaatomsaasacarbonaatoms

Aanewaorganismahasabeenarecentlyadiscoveredainatheaocean.aAllathataisaknownaofatheaorgan
ism'sacellastructureaisathataitalacksaaamembraneaboundanucleus.aWhichaofatheafollowingaindi
catesahowathisaorganismawillabeaclassifiedainatermsaofacellatypea?

, a)aplant
b)aanimal
c)aProkaryote
d)aFungusa-aCORRECTaaANSWER-Prokaryote

Aaprotonashouldahaveawhatatwoacharacteristicsawhenacomparedatoatheachargeaandatheamas
saofaanaelectron?
a)atheasameachargeaandatheasameamass
b)atheasameachargeaandalargeramass
c)aanaoppositeachargeaandasameamass
d)aanaoppositeachargeaandalargeramassa-aCORRECTaaANSWER-
Anaoppositeachargeaandaaalargeramass

Aaresearchastudentaisadeterminingatheapollenacountaforaaa24-
houraperiodainaaagivenalocation.aTheastudentsadataawouldabeamostareliableaifaheadecidedatoa
countatheapollenainawhat?
a)aaasingleadecimeterasquareaforaoneamorningaandaoneaafternoon
b)amultipleadecimeterasquaresaforaoneamorningaandaoneaafternoon
c)aaasingleadecimeterasquareaforaoneaafternoon
d)amultipleadecimeterasquaresaforaoneaafternoona-aCORRECTaaANSWER-
Multipleadecimeterasquaresaforaoneamorningaandaoneaafternoon

Aaresearchastudentapredictsathataratsaraisedainaaastimulatingaenvironmentawillalearnafasterat
hanaratsaraisedainaanaisolatedaenvironment.aThisapredictionacorrespondsawithawhichaofatheaf
ollowingastepsainatheascientificamethod?
a)aformulatingaaahypothesis
b)aconductingaanaexperiment
c)aanalyzingathearesults
d)adrawingaaaconclusiona-aCORRECTaaANSWER-Formulatingaaahypothesis

Aaresearcheraconductsaaastudyatoaexamineatheaeffectsathatatimeaspentainaextracurricularainv
olvementahasaonacollegeaentranceaexamascores.aInathisastudy,aextra-
curricularainvolvementaisawhatatypeaofavariable?
a)adependent
b)aindependent
c)aextraneous
d)aqualitativea-aCORRECTaaANSWER-Independent

Aaresearcherawishesatoatestatheahypothesisathatasoyaisaaasuperioradietacomparedatoawholea
wheataforatheareproductiveapurposesaofaaacertainatypeaofabeetle.aWhichaofatheafollowingades
cribesahowathearesearcherashouldabestatestathisahypothesis?
a)arecordanumberaofaeggsarecoveredafromaaasingleaculture
b)acountatheaeggsarecoveredafroma10aseparateaculturesarearedaonasoyaversusaaasingleacult
ureaonawholeawheat
c)acompareatheaeggsafroma10asoyaculturesaversusa10awhole-wheatacultures