Test Bank: Understanding Pathophysiology, 7th Edition by Sue E. Huether - Chapters 1-44

,Chapteri1.iCellulariBiology

MULTIPLEiCHOICE

1. Aistudentiisiobservingiaicelliunderitheimicroscope.iItiisiobserveditoihaveisupercoilediDNAiwi
thihistones.iWhichiofitheifollowingiwouldialsoibeiobservedibyitheistudent?

a. Aisingleicircularichromosome
b. Ainucleus
c. Free-floatinginuclearimaterial
d. Noiorganelles


ANS:iB

Theicellidescribediisiaieukaryoticicell,isoiitihasihistonesiandiaisupercoilediDNAiwithiniitsinucleus
;ithus,itheinucleusishouldibeiobserved.

Aisingleicircularichromosomeiisicharacteristiciofiprokaryoticicells,iwhichidoinotihaveihistones.

Free-
floatinginuclearimaterialidescribesiaiprokaryoticicell,iwhichiwouldinotihaveiaidistinctinucleus.

Eukaryoticicellsihaveimembraneiboundedicellularicomponentsicallediorganelles.iNoiorganellesidescrib
esiaiprokaryoticicell.

2. Ainurseiisiinstructingitheistaffiabouticellularifunctions.iWhichicellularifunctioniisitheinurseide
scribingiwhenianiisolatedicelliabsorbsioxygeniandiusesiititoitransforminutrientsitoienergy?

a. Metaboliciabsorption
b. Communication
c. Secretion
d. Respiration

,ANS:iD

Theiabilityiofitheicellitoiabsorbioxygenirefersitoitheicellsifunctioniofirespiration.

Theiabilityiofitheicellitoifunctioniwithiniaisocietyioficellsirefersitoi itsifunctionioficommunication.

Theiabilityiofitheicellitoitakeiininutrientsirefersitoitheicellsifunctioniofimetaboliciabsorption.

Theiabilityiofitheicellitoisynthesizeinewisubstancesiandisecreteitheseielsewhereirefersitoitheicellsifunctio
niofisecretion.

3. AieukaryoticicelliisiundergoingiDNAireplication.iIniwhichiregioniofitheicelliwouldimostiofith
eigenetici informationibeicontained?

a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus


ANS:iC

Theiregioniofitheicellithaticontainsigeneticimaterial,iincludingiailargeiamountiofiribonucleiciacid,i
mostiofitheiDNA,iandiDNA-bindingiproteins,iisitheinucleolus.

Theimitochondriaiisitheisiteioficellularirespiration.

Theiribosomesiareiinvolvediinimanufacturingiofiproteinsiwithinitheicell.

Theinucleusicontainsitheinucleolus,iandiitiisitheinucleolusithaticontainsigeneticimaterial.

4. Theifluidimosaicimodeliforibiologicimembranesidescribesimembraneibehavior.iAccordingitoith
isimodel,iwhichiofitheifollowingifloatisinglyioriasiaggregatesiinitheifluidilipidibilayer?

a. Peripheralimembraneiproteins
b. Integralimembraneiproteins

, c. Glycoproteins
d. Celliadhesionimolecules


ANS:iB

Integralimembraneiproteinsifloatifreelyiinitheifluidilipidibilayer.

Peripheralimembraneiproteinsiareinotiembeddediinitheilayer,ibutiresideiatitheisurface.iGlycoprote

insiacti asicellisurfacei markers.

Celliadhesionimoleculesiareionitheioutsideiofitheimembraneiandiallowicellsitoihookitogether.

5. Whichiofitheifollowingicanibinditoiplasmaimembraneireceptors?

a. Oxygen
b. Ribosomes
c. Amphipathicilipids
d. Ligands


ANS:iD

Ligandsiareispecificimoleculesithaticanibindiwithireceptorsionitheicellimembrane.iOxygen

imovesibyidiffusion;iiti doesinotibinditoireceptors.



Ribosomesimakeiproteinsiandiareinotiinvolvediinibinding.i

Amphipathicilipidsiareiaiportioniofitheicellimembrane.

6. Ainurseiisireviewingiaireportifromiaipatientiwithimetastaticicancer.iWhatifindingiwouldisu
pportitheidiagnosisiofimetastaticicancer?iAlterationsiiniextracellularimatrixithatiinclude:

a. Decreasedifibronectin
b. Increasedicollagen
c. Decreasedielastin