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Allwellsolved complete(questionsandanswers)solutioninthistest bank
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,Chapter1.Cellular Biology v8 v8 v8
MULTIPLECHOICE v8
1. Astudent isobservingacellunder themicroscope. Itisobservedto havesupercoiledDNA with
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v8 histones. Which of the following would also be observed by the student?
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a. Asingle circular chromosome v8 v 8
b. Anucleus v8
c. Free-floatingnuclear material v8 v8
d. Noorganelles v8
ANS:B v8
Thecelldescribed isaeukaryoticcell, so it hashistonesandasupercoiledDNAwithinits nucleus;
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v8 thus, the nucleus should be observed.
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Asingle circular chromosome ischaracteristic ofprokaryotic cells, whichdo not havehistones.
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Free-floatingnuclearmaterialdescribesaprokaryoticcell,which wouldnothaveadistinct nucleus.
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Eukaryoticcellshavemembraneboundedcellularcomponentscalledorganelles.Noorganelles
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v8 describes a prokaryotic cell. v8 v8 v8
2. Anurse is instructingthestaffaboutcellular functions. Whichcellular functionisthenurse
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v8 describing when an isolated cell absorbs oxygen and uses it to transform nutrients to energy?
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a. Metabolicabsorption v8
b. Communication
c. Secretion
d. Respiration
, ANS:D v8
Theabilityofthe cellto absorboxygenrefers to the cells functionofrespiration.
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The abilityofthe cellto functionwithin a societyofcellsrefersto itsfunctionof communication.
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Theabilityofthe celltotake in nutrients refers tothe cells functionof metabolic absorption.
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Theabilityofthecellto synthesize newsubstances and secretetheseelsewherereferstothecells function of
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v8 secretion.
3. Aeukaryotic cellisundergoing DNAreplication. Inwhichregionofthe cellwould most of the
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v8 genetic information be contained?
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a. Mitochondria
b. Ribosome
c. Nucleolus
d. Nucleus
ANS:C v8
Theregionofthecellthat containsgenetic material, includinga largeamount of ribonucleic acid,
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v8 most of the DNA, and DNA-binding proteins, is the nucleolus.
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The mitochondria isthesiteofcellular respiration.
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Theribosomes are involved inmanufacturing ofproteins withinthe cell.
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Thenucleuscontainsthenucleolus,and it isthenucleolusthatcontainsgenetic material.
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4. Thefluidmosaicmodelforbiologicmembranesdescribesmembrane behavior.Accordingto this
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v8 model, which of the following float singly or as aggregates in the fluid lipid bilayer?
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a. Peripheralmembrane proteins v 8
b. Integralmembraneproteins v8 v8