,Chapter p1. pCellular pBiology
MULTIPLE pCHOICE
1. A pstudent pis pobserving pa pcell punder pthe pmicroscope. pIt pis pobserved pto phave
psupercoiled pDNA pwith phistones. pWhich pof pthe pfollowing pwould palso pbe
pobserved pby pthe pstudent?
a. A psingle pcircular pchromosome
b. A pnucleus
c. Free-floating pnuclear pmaterial
d. No porganelles
ANS: pB
The pcell pdescribed pis pa peukaryotic pcell, pso pit phas phistones pand pa psupercoiled
pDNA pwithin pits pnucleus; pthus, pthe pnucleus pshould pbe pobserved.
A psingle pcircular pchromosome pis pcharacteristic pof pprokaryotic pcells, pwhich pdo pnot phave
phistones.
Free-floating pnuclear pmaterial pdescribes pa pprokaryotic pcell, pwhich pwould pnot phave pa
pdistinct pnucleus.
Eukaryotic pcells phave pmembrane pbounded pcellular pcomponents pcalled porganelles. pNo
porganelles pdescribes pa pprokaryotic pcell.
2. A pnurse pis pinstructing pthe pstaff pabout pcellular pfunctions. pWhich pcellular
pfunction pis pthe pnurse pdescribing pwhen pan pisolated pcell pabsorbs poxygen pand
puses pit pto ptransform pnutrients pto penergy?
a. Metabolic pabsorption
b. Communication
c. Secretion
d. Respiration
,ANS: pD
The pability pof pthe pcell pto pabsorb poxygen prefers pto pthe pcells pfunction pof prespiration.
The pability pof pthe pcell pto pfunction pwithin pa psociety pof pcells prefers pto pits pfunction
pof pcommunication.
The pability pof pthe pcell pto ptake pin pnutrients prefers pto pthe pcells pfunction pof pmetabolic
pabsorption.
The pability pof pthe pcell pto psynthesize pnew psubstances pand psecrete pthese pelsewhere
prefers pto pthe pcells pfunction pof psecretion.
3. A peukaryotic pcell pis pundergoing pDNA preplication. pIn pwhich pregion pof pthe pcell
pwould pmost pof pthe pgenetic pinformation pbe pcontained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS: pC
The pregion pof pthe pcell pthat pcontains pgenetic pmaterial, pincluding pa plarge pamount pof
pribonucleic pacid, pmost pof pthe pDNA, pand pDNA-binding pproteins, pis pthe pnucleolus.
The pmitochondria pis pthe psite pof pcellular prespiration.
The pribosomes pare pinvolved pin pmanufacturing pof pproteins pwithin pthe pcell.
The pnucleus pcontains pthe pnucleolus, pand pit pis pthe pnucleolus pthat pcontains pgenetic pmaterial.
4. The pfluid pmosaic pmodel pfor pbiologic pmembranes pdescribes pmembrane pbehavior.
pAccording pto pthis pmodel, pwhich pof pthe pfollowing pfloat psingly por pas paggregates
pin pthe pfluid plipid pbilayer?
a. Peripheral pmembrane pproteins
b. Integral pmembrane pproteins
, c. Glycoproteins
d. Cell padhesion pmolecules
ANS: pB
Integral pmembrane pproteins pfloat pfreely pin pthe pfluid plipid pbilayer.
Peripheral pmembrane pproteins pare pnot pembedded pin pthe player, pbut preside pat pthe
psurface. pGlycoproteins pact pas pcell psurface pmarkers.
Cell padhesion pmolecules pare pon pthe poutside pof pthe pmembrane pand pallow pcells pto phook
ptogether.
5. Which pof pthe pfollowing pcan pbind pto pplasma pmembrane preceptors?
a. Oxygen
b. Ribosomes
c. Amphipathic plipids
d. Ligands
ANS: pD
Ligands pare pspecific pmolecules pthat pcan pbind pwith preceptors pon pthe pcell
pmembrane. pOxygen pmoves pby pdiffusion; pit pdoes pnot pbind pto preceptors.
Ribosomes pmake pproteins pand pare pnot pinvolved pin
pbinding. pAmphipathic plipids pare pa pportion pof pthe
pcell pmembrane.
6. A pnurse pis previewing pa preport pfrom pa ppatient pwith pmetastatic pcancer. pWhat
pfinding pwould psupport pthe pdiagnosis pof pmetastatic pcancer? pAlterations pin
pextracellular pmatrix pthat pinclude:
a. Decreased pfibronectin
b. Increased pcollagen
c. Decreased pelastin
MULTIPLE pCHOICE
1. A pstudent pis pobserving pa pcell punder pthe pmicroscope. pIt pis pobserved pto phave
psupercoiled pDNA pwith phistones. pWhich pof pthe pfollowing pwould palso pbe
pobserved pby pthe pstudent?
a. A psingle pcircular pchromosome
b. A pnucleus
c. Free-floating pnuclear pmaterial
d. No porganelles
ANS: pB
The pcell pdescribed pis pa peukaryotic pcell, pso pit phas phistones pand pa psupercoiled
pDNA pwithin pits pnucleus; pthus, pthe pnucleus pshould pbe pobserved.
A psingle pcircular pchromosome pis pcharacteristic pof pprokaryotic pcells, pwhich pdo pnot phave
phistones.
Free-floating pnuclear pmaterial pdescribes pa pprokaryotic pcell, pwhich pwould pnot phave pa
pdistinct pnucleus.
Eukaryotic pcells phave pmembrane pbounded pcellular pcomponents pcalled porganelles. pNo
porganelles pdescribes pa pprokaryotic pcell.
2. A pnurse pis pinstructing pthe pstaff pabout pcellular pfunctions. pWhich pcellular
pfunction pis pthe pnurse pdescribing pwhen pan pisolated pcell pabsorbs poxygen pand
puses pit pto ptransform pnutrients pto penergy?
a. Metabolic pabsorption
b. Communication
c. Secretion
d. Respiration
,ANS: pD
The pability pof pthe pcell pto pabsorb poxygen prefers pto pthe pcells pfunction pof prespiration.
The pability pof pthe pcell pto pfunction pwithin pa psociety pof pcells prefers pto pits pfunction
pof pcommunication.
The pability pof pthe pcell pto ptake pin pnutrients prefers pto pthe pcells pfunction pof pmetabolic
pabsorption.
The pability pof pthe pcell pto psynthesize pnew psubstances pand psecrete pthese pelsewhere
prefers pto pthe pcells pfunction pof psecretion.
3. A peukaryotic pcell pis pundergoing pDNA preplication. pIn pwhich pregion pof pthe pcell
pwould pmost pof pthe pgenetic pinformation pbe pcontained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS: pC
The pregion pof pthe pcell pthat pcontains pgenetic pmaterial, pincluding pa plarge pamount pof
pribonucleic pacid, pmost pof pthe pDNA, pand pDNA-binding pproteins, pis pthe pnucleolus.
The pmitochondria pis pthe psite pof pcellular prespiration.
The pribosomes pare pinvolved pin pmanufacturing pof pproteins pwithin pthe pcell.
The pnucleus pcontains pthe pnucleolus, pand pit pis pthe pnucleolus pthat pcontains pgenetic pmaterial.
4. The pfluid pmosaic pmodel pfor pbiologic pmembranes pdescribes pmembrane pbehavior.
pAccording pto pthis pmodel, pwhich pof pthe pfollowing pfloat psingly por pas paggregates
pin pthe pfluid plipid pbilayer?
a. Peripheral pmembrane pproteins
b. Integral pmembrane pproteins
, c. Glycoproteins
d. Cell padhesion pmolecules
ANS: pB
Integral pmembrane pproteins pfloat pfreely pin pthe pfluid plipid pbilayer.
Peripheral pmembrane pproteins pare pnot pembedded pin pthe player, pbut preside pat pthe
psurface. pGlycoproteins pact pas pcell psurface pmarkers.
Cell padhesion pmolecules pare pon pthe poutside pof pthe pmembrane pand pallow pcells pto phook
ptogether.
5. Which pof pthe pfollowing pcan pbind pto pplasma pmembrane preceptors?
a. Oxygen
b. Ribosomes
c. Amphipathic plipids
d. Ligands
ANS: pD
Ligands pare pspecific pmolecules pthat pcan pbind pwith preceptors pon pthe pcell
pmembrane. pOxygen pmoves pby pdiffusion; pit pdoes pnot pbind pto preceptors.
Ribosomes pmake pproteins pand pare pnot pinvolved pin
pbinding. pAmphipathic plipids pare pa pportion pof pthe
pcell pmembrane.
6. A pnurse pis previewing pa preport pfrom pa ppatient pwith pmetastatic pcancer. pWhat
pfinding pwould psupport pthe pdiagnosis pof pmetastatic pcancer? pAlterations pin
pextracellular pmatrix pthat pinclude:
a. Decreased pfibronectin
b. Increased pcollagen
c. Decreased pelastin
