TEST BANK FOR Microbiology: An Evolving Science, 6th Edition by Joan L. Slonczewski | All Chapters (Newest Edition 2025). Already graded A+

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,
,CHAPTER 1: MicrobialLife:OriginandDiscovery
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MULTIPLE CHOICE
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1. Viruses are: sl



a. infectious agents that infect multi-cellular organisms sl sl 5% sl sl



b. noncellularparticlesthattakeoverthemetabolismofacellto generatemor e vir ls ls ls ls ls ls ls ls 5% ls sl sl



usparticles
c. pathogens that replicateincomplex growth media 5% sl sl sl sl sl



d. cellular particlesthat belong to the archaeadomain sl sl sl sl sl sl ls



e. microbes that consist of lipid membrane enclosed genomes sl 5% sl sl sl sl sl




ANS: B DIF:
s ls l Easy REF: 1.1 TOP: I.A|I.B s l ls ls



MSC: Remembering
s l




2. Analysis of DNA sequences reveals: sl sl 5% 5%



a. theancientconvergenceoftwocelltypes,i.e., prokaryotesandeuka r yote
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s
b. prokaryotesand eukaryotesxevolved froma common ancestral cell sl sl sl sl sl sl sl



c. thatxbacteriasharecommonancestorwitharchaea,butnotwitheuk a rya sl ls sl sl sl sl sl sl ls sl sl



d. prokaryotesare cellswith a nucleus sl sl sl 5% 5%



e. thegenome of Haemophilus influenzae hasabout 2billionbase pairs
ls sl sl sl sl ls 5% sl sl sl




ANS: B DIF:
s ls l Easy REF: 1.1 TOP: I.A|I.B s l ls ls



MSC: Remembering
s l




3. Whichofthesegroups areconsideredtobe microbesbut NOTconsideredto becells?
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a. viruses d. protists s l



b. bacteria e. filamentousfungi s l sl



c. archaea
ANS: A DIF:
s ls l Easy REF: 1.1 TOP: I.A.i s l



MSC: Remembering
s l




4. Amicrobe iscommonlydefined as:
sl sl sl sl sl



a. avirusthatrequiresa microscopetobe seen
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b. abacteriumthatrequiresa microscopeto be seen
ls ls sl ls 5% ls 5% sl


c. asingle- ls



cellular prokaryote that requiresa microscope tobe seen sl sl sl sl sl sl sl sl



d. amulticellular eukaryote that requires a microscopetobe se en
sl sl sl sl 5% sl sl ls sl sl



e. alivingorganismthat requiresamicroscopeto bexseen
sl sl ls 5% sl sl sl sl




ANS: E DIF:
s ls l Easy REF: 1.1 TOP: I.A.i|I.A.ii s l ls ls



MSC: Remembering
s l




5. Whichoneofthefollowing statements regarding microbial cells isxNOT true?
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a. Microbialcellsacquirefood, gainenergytobuild themselves, andrespo ndtsl sl sl sl sl ls sl sl sl sl sl sl



o
environmental change. sl

, b. Mostxsingle-
celledorganisms requireamicroscopetorenderthemvisible,butsome bacter
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ial cells arexlarge enough to be seen with naked eyes.
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c. Microbes functionasindividualentities. 5% ls sl sl



d. Manymicrobes formcomplex multicellular assemblages.
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e. Viruses are not consideredasxmicrobialcells. 5% sl sl sl sl




ANS: C s ls l DIF: Easy REF: 1.1 TOP: I.A.i|I.A.ii s l ls ls



MSC: Remembering
s l




6. Whichof thefollowingstatementsis FALSE?
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a. Agenomeisthetotal genetic informationcontainedinanorganism’s chromosomal D NA.
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b. Ifa microbe’s genomexincludes genes for nitrogenase, that microbe probablycanfix nit
sl sl sl 5% 5% sl sl sl sl ls ls sl


rogen.
c. Bycomparing DNAsequencesofdifferentorganisms,wexcanfigureout howclosely r ela
ls 5% ls ls ls ls ls ls sl ls sl sl



ted they are. sl sl



d. FredSanger developed thefirst applicable DNA sequencingmethod.
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e. FredSanger completed thesequences of Haemophilus influenzae.
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ANS: E s ls l DIF: Easy REF: 1.1 TOP: I.B s l



MSC: Remembering
s l




7. Thefirstcellular genomestobe sequencedwerethoseof:
ls sl sl sl sl sl sl sl ls



a. humans d. prions s l



b. bacteria e. fungi s l s l



c. viruses
ANS: B s ls l DIF: Easy REF: 1.1 TOP: I.B.i s l



MSC: Remembering
s l




8. The environment ofearlyEarth mayhavecontainedallofthefollowingEXCEPT:
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a. ferrous iron d. oxygen 5% s l



b. methane e. hydrogengas s l sl



c. ammonia
ANS: D s ls l DIF: Easy
REF:Special Topic1.1TOP: II.D MS C: ls 5% ls s l sl sl



Remembering
sl




9. Thedevelopment ofthetheoryofthe―RNA world‖ resultedfromthediscoveryof:
ls 5% sl sl ls sl ls 5% s l ls sl



a. archaea d. ribozymes s l



b. prions e. endosymbionts s l s l



c. bacteria
ANS: D s ls l DIF: Medium
REF:Special Topic1.1TOP: II.D MS C: ls 5% ls s l sl sl



Remembering
sl




10. Whichmicrobes mayresemblethoseoftheearliest lifeforms?
ls 5% sl sl ls sl sl 5% sl



a. archaea d. cyanobacteria slsl



b. photosynthetic algae e. protists 5% s l s l



c. viruses
ANS: A s ls l DIF: Medium
REF:Special Topic1.1TOP: II.D MS C: ls 5% ls s l sl sl



Remembering
sl




11. Earlymetabolism mayhavebeencatalyzedby:
ls 5% sl sl sl sl



a. DNA d. aminoxacids slsl