,Chapter1.Cellular Biology t7
MULTIPLECHOICE
1. Astudentisobservingacellunderthemicroscope.Itisobservedtohavesupercoiled DNAwith
t7 1k 1k t7 1k t7
t7 histones.Whichofthefollowingwouldalsobeobservedbythestudent?
t7
a. Asinglecircularchromosome
b. Anucleus
c. Free-floatingnuclear material 1k t7
d. Noorganelles
ANS:B
Thecelldescribedisaeukaryoticcell,soithashistonesandasupercoiledDNAwithin itsnucleus; thus,
1k t7 t7 t7 t7 1k 1k t7 t7
thenucleusshouldbeobserved.
t7 t7 t7
Asinglecircularchromosome ischaracteristicofprokaryoticcells,whichdonothavehistones. t7 1k 1k t7 1k t7
t7Free-floating nuclearmaterialdescribesaprokaryoticcell,whichwouldnot haveadistinctnucleus.
1k t7 1k 1k 1k 1k 1k 1k t7
Eukaryoticcellshavemembraneboundedcellularcomponentscalledorganelles.Noorganellesdescribes 1k t7
t7 a prokaryotic cell.
1k
2. Anurse isinstructingthestaffabout cellularfunctions.Whichcellularfunction isthenurse 1k t7 1k t7 1k
t7 describingwhen anisolated 1k 1k t 7 t 7
t 7 cellabsorbsoxygenandusesittotransformnutrientstoenergy?
a. Metabolicabsorption
b. Communication
c. Secretion
d. Respiration
,ANS:D
The abilityofthecelltoabsorboxygenreferstothe cells functionofrespiration.
1k t7 t7 t7 1k
Theabilityofthecell tofunction withinasocietyofcellsreferstoitsfunctionofcommunication.
1k t7 1k t7
t7 The abilityofthecelltotakein nutrientsrefersto thecells function ofmetabolic absorption.
1k t7 1k t7 1k t7 1k t7 t7 1k t7 t7
Theabilityofthecelltosynthesizenewsubstancesandsecretetheseelsewherereferstothecellsfunction t7
t7 ofsecretion.
3. Aeukaryoticcell isundergoingDNAreplication.Inwhich regionofthecellwould most of the
1k 1k t7 t7 1k t7 1k 1k t7 1k
t7 geneticinformationbecontained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS:C
Theregionofthecellthatcontainsgeneticmaterial,includinga largeamount ofribonucleicacid,
1k t7 1k t7 t7 1k t7
t7 most ofthe DNA,and DNA-binding proteins, isthenucleolus.
1k t7 t7 1k t7 1k t7 t7 t7
Themitochondria isthesiteofcellularrespiration. t7 1k
Theribosomesareinvolved inmanufacturing ofproteins withinthecell. 1k 1k 1k
Thenucleuscontainsthenucleolus,anditisthenucleolusthat contains geneticmaterial.
t7 1k 1k t7 t7 1k 1k 1k t7
4. Thefluid mosaicmodelforbiologicmembranesdescribesmembranebehavior.According tothis
1k 1k 1k t7
t7 model,whichofthefollowingfloatsinglyorasaggregatesin thefluidlipid bilayer?
t7 t7 t7 1k t7 t7 1k
a. Peripheralmembraneproteins
b. Integralmembraneproteins
, c. Glycoproteins
d. Cell adhesionmolecules
1k t7
ANS:B
Integralmembraneproteinsfloat freelyinthefluid lipid bilayer. 1k t7 1k t7 1k t7 1k
t7Peripheralmembraneproteinsarenot embedded in thelayer,but resideatthesurface.Glycoproteins 1k t7 1k t7 1k t7 t7
t7actascellsurfacemarkers.
Celladhesionmoleculesareonthe outsideofthemembraneandallowcellsto hooktogether.1k t7 1k
5. Whichofthefollowingcanbind toplasmamembranereceptors? 1k t7
a. Oxygen
b. Ribosomes
c. Amphipathiclipids
d. Ligands
ANS:D
Ligands arespecificmoleculesthatcanbindwithreceptorsonthecellmembrane.Oxygen
1k t7 1k 1k t7
t7 movesbydiffusion;itdoesnot bindtoreceptors.t7 1k t7
Ribosomesmakeproteinsandarenot involved inbinding.
1k 1k 1k 1k 1k 1k
t7 Amphipathiclipidsareaportionofthecellmembrane.
6. Anurse isreviewingareportfromapatient withmetastaticcancer.Whatfindingwould 1k t7
1k
t 7 supportthediagnosisofmetastaticcancer?Alterationsinextracellular
1k 1k 1k
matrixthatinclude:
t7 1k
a. Decreasedfibronectin1k
b. Increasedcollagen
c. Decreasedelastin 1k
MULTIPLECHOICE
1. Astudentisobservingacellunderthemicroscope.Itisobservedtohavesupercoiled DNAwith
t7 1k 1k t7 1k t7
t7 histones.Whichofthefollowingwouldalsobeobservedbythestudent?
t7
a. Asinglecircularchromosome
b. Anucleus
c. Free-floatingnuclear material 1k t7
d. Noorganelles
ANS:B
Thecelldescribedisaeukaryoticcell,soithashistonesandasupercoiledDNAwithin itsnucleus; thus,
1k t7 t7 t7 t7 1k 1k t7 t7
thenucleusshouldbeobserved.
t7 t7 t7
Asinglecircularchromosome ischaracteristicofprokaryoticcells,whichdonothavehistones. t7 1k 1k t7 1k t7
t7Free-floating nuclearmaterialdescribesaprokaryoticcell,whichwouldnot haveadistinctnucleus.
1k t7 1k 1k 1k 1k 1k 1k t7
Eukaryoticcellshavemembraneboundedcellularcomponentscalledorganelles.Noorganellesdescribes 1k t7
t7 a prokaryotic cell.
1k
2. Anurse isinstructingthestaffabout cellularfunctions.Whichcellularfunction isthenurse 1k t7 1k t7 1k
t7 describingwhen anisolated 1k 1k t 7 t 7
t 7 cellabsorbsoxygenandusesittotransformnutrientstoenergy?
a. Metabolicabsorption
b. Communication
c. Secretion
d. Respiration
,ANS:D
The abilityofthecelltoabsorboxygenreferstothe cells functionofrespiration.
1k t7 t7 t7 1k
Theabilityofthecell tofunction withinasocietyofcellsreferstoitsfunctionofcommunication.
1k t7 1k t7
t7 The abilityofthecelltotakein nutrientsrefersto thecells function ofmetabolic absorption.
1k t7 1k t7 1k t7 1k t7 t7 1k t7 t7
Theabilityofthecelltosynthesizenewsubstancesandsecretetheseelsewherereferstothecellsfunction t7
t7 ofsecretion.
3. Aeukaryoticcell isundergoingDNAreplication.Inwhich regionofthecellwould most of the
1k 1k t7 t7 1k t7 1k 1k t7 1k
t7 geneticinformationbecontained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS:C
Theregionofthecellthatcontainsgeneticmaterial,includinga largeamount ofribonucleicacid,
1k t7 1k t7 t7 1k t7
t7 most ofthe DNA,and DNA-binding proteins, isthenucleolus.
1k t7 t7 1k t7 1k t7 t7 t7
Themitochondria isthesiteofcellularrespiration. t7 1k
Theribosomesareinvolved inmanufacturing ofproteins withinthecell. 1k 1k 1k
Thenucleuscontainsthenucleolus,anditisthenucleolusthat contains geneticmaterial.
t7 1k 1k t7 t7 1k 1k 1k t7
4. Thefluid mosaicmodelforbiologicmembranesdescribesmembranebehavior.According tothis
1k 1k 1k t7
t7 model,whichofthefollowingfloatsinglyorasaggregatesin thefluidlipid bilayer?
t7 t7 t7 1k t7 t7 1k
a. Peripheralmembraneproteins
b. Integralmembraneproteins
, c. Glycoproteins
d. Cell adhesionmolecules
1k t7
ANS:B
Integralmembraneproteinsfloat freelyinthefluid lipid bilayer. 1k t7 1k t7 1k t7 1k
t7Peripheralmembraneproteinsarenot embedded in thelayer,but resideatthesurface.Glycoproteins 1k t7 1k t7 1k t7 t7
t7actascellsurfacemarkers.
Celladhesionmoleculesareonthe outsideofthemembraneandallowcellsto hooktogether.1k t7 1k
5. Whichofthefollowingcanbind toplasmamembranereceptors? 1k t7
a. Oxygen
b. Ribosomes
c. Amphipathiclipids
d. Ligands
ANS:D
Ligands arespecificmoleculesthatcanbindwithreceptorsonthecellmembrane.Oxygen
1k t7 1k 1k t7
t7 movesbydiffusion;itdoesnot bindtoreceptors.t7 1k t7
Ribosomesmakeproteinsandarenot involved inbinding.
1k 1k 1k 1k 1k 1k
t7 Amphipathiclipidsareaportionofthecellmembrane.
6. Anurse isreviewingareportfromapatient withmetastaticcancer.Whatfindingwould 1k t7
1k
t 7 supportthediagnosisofmetastaticcancer?Alterationsinextracellular
1k 1k 1k
matrixthatinclude:
t7 1k
a. Decreasedfibronectin1k
b. Increasedcollagen
c. Decreasedelastin 1k
