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1. A bstudent bis bobserving ba bcell bunder bthe bmicroscope. bIt bis bobserved bto bhave
bsupercoiled bDNAbwith bhistones. b Which bof bthe bfollowing bwould balso b be bobserved bby
bthe bstudent?
a. A bsingle bcircular bchromosome
b. A bnucleus
c. Free-floating bnuclear bmaterial
d. No borganelles
ANS: bB
The bcell bdescribed bis ba beukaryotic bcell, bso bit bhas bhistones band ba bsupercoiled bDNA
bwithin bitsbnucleus; bthus, bthe bnucleus bshould b be bobserved.
A bsingle bcircular bchromosome bis bcharacteristic bof bprokaryotic bcells, bwhich bdo bnot bhave
bhistones.
Free-floating bnuclear bmaterial bdescribes ba bprokaryotic bcell, bwhich bwould bnot bhave ba
bdistinctbnucleus.
2. A bnurse bis binstructing bthe bstaff babout bcellular bfunctions. bWhich bcellular bfunction bis
bthe bnursebdescribing bwhen ban bisolated bcell babsorbs boxygen band buses bit b to btransform
bnutrients bto b energy?
a. Metabolic babsorption
b. Communication
c. Secretion
d. Respiration
The bability bof bthe bcell bto bfunction bwithin ba bsociety bof bcells brefers bto b its bfunction bof
bcommunication.
The bability bof bthe bcell bto btake bin bnutrients brefers bto bthe bcells bfunction bof bmetabolic
babsorption.
The bability bof bthe bcell bto bsynthesize bnew bsubstances band bsecrete bthese belsewhere brefers bto
bthe bcellsbfunction bof bsecretion.
3. A beukaryotic bcell bis bundergoing bDNA breplication. bIn bwhich bregion bof bthe bcell bwould
b most bofbthe bgenetic b information bbe bcontained?
a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS: bC
The bregion bof bthe bcell bthat bcontains bgenetic bmaterial, bincluding ba blarge bamount bof
bribonucleicbacid, b most bof bthe bDNA, band bDNA-binding bproteins, bis bthe bnucleolus.
The bmitochondria bis bthe bsite bof bcellular brespiration.
The bribosomes bare binvolved bin bmanufacturing bof bproteins bwithin bthe bcell.
The bnucleus bcontains bthe bnucleolus, band bit bis bthe bnucleolus bthat bcontains bgenetic bmaterial.
4. The bfluid bmosaic bmodel bfor bbiologic bmembranes bdescribes bmembrane bbehavior.
bAccording btobthis bmodel, bwhich bof bthe bfollowing b float b singly bor bas baggregates bin bthe
bfluid blipid bbilayer?
a. Peripheral bmembrane bproteins
b. Integral bmembrane bproteins
, c. Glycoproteins
d. Cell badhesion bmolecules
ANS: bB
Integral bmembrane bproteins bfloat bfreely bin bthe bfluid blipid bbilayer.
Peripheral bmembrane bproteins bare bnot bembedded bin bthe blayer, bbut breside bat bthe
bsurface.bGlycoproteins bact b as bcell bsurface b markers.
Cell badhesion bmolecules bare bon bthe boutside bof bthe bmembrane band ballow bcells bto bhook
btogether.
bmembrane.bOxygen bmoves bby bdiffusion; bit b does b not b bind bto breceptors.
Ribosomes bmake bproteins band bare bnot binvolved bin
bbinding.bAmphipathic blipids bare ba bportion bof bthe bcell
bmembrane.
6. A bnurse bis breviewing ba breport bfrom ba bpatient bwith bmetastatic bcancer. bWhat
bfinding bwouldbsupport bthe bdiagnosis bof bmetastatic bcancer? bAlterations bin bextracellular
b matrix bthat binclude:
a. Decreased bfibronectin
b. Increased bcollagen
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