STRAIGHTERLINE MICROBIOLOGY FINAL EXAM
2025 WITH 100% CORRECT ANSWERS
In fthe fnitrogen fcycle, fwhich fof fthe ffollowing fsteps finvolves fremoval fof fnitrogen ffrom
fthe fatmosphere fby fbacteria? f- fanswersNitrogen fFixation
If fenough fH+ fions fare fadded fto fpure fwater fto fraise fthe fH+ fconcentration fof fthe
fsolution fto ften ftimes fhigher fthan fthe foriginal fconcentration, fwhat fis fthe fresulting fOH-
fconcentration fof fthe fsolution? f- fanswers10-8 fM
Fungi fare fable fto freproduce fasexually fby fcreating fconidiospores fand
fsporangiospores. fWhich fof fthe ffollowing fis fan faccurate fexplanation ffor fwhy fit fis
fadvantageous fthat fthey fare falso fcapable fof fsexual freproduction? f- fanswersOffspring
ffrom ftwo fparents fmay fhave fvariations fin fform fand ffunction fthat fcontribute fto fsurvival
fof fthe fspecies.
In fa flaboratory fbacterial fcell fculture fthat fhas fbeen finfected fby fa fvirus, fplaques fare
fareas fin fwhich... f- fanswersthe fvirus fhas fspread fand fleft fbehind fthe fremains fof fdead
fcells.
The fsun's fenergy fis fdelivered fas fdiscrete fpackets fthat ftravel fas fwaves fand fare fcalled
f- fanswersPhotons
What fis fa fcharacteristic fof faerobic frespiration? f- fanswersThe fprocess fincludes
fglycolysis, fthe fKrebs fcycle, fand fthe felectron ftransport fchain.
In fcompleting fprotein fsynthesis fin fa fprokaryote, fwhat fbasic fmessage fis fcarried fby fa
fspecialized fcodon fthat fhas fno fcorresponding ftRNA? f- fanswers"Terminate fhere."
Microbial fdrug fresistance fcan fbe fcaused fby fmutations for fby fintroduction fof fnew
fgenes finto fa fpopulation. fWhich fof fthe ffollowing fcan fonly fbe fcaused fby fthe
fintroduction fof fnew fgenes finto fa fpopulation? f- fanswersnew fenzymes fthat finactivate
fthe fdrug fare fsynthesized
Why fdo fthe fhands, ffeet, fand fbreasts fhave fmore flymphatic fvessels ffor fhost fdefense
fthan fother fareas fof fthe fhuman fbody? f- fanswersThey fhave fa fhigh frisk ffor finfection
fdue fto ffrequent fcontact.
Penicillin ffunctions fas fan fantimicrobial fagent fby finhibiting fbacterial... f- fanswerscell
fwall fsynthesis.
Which fclass fof feukaryotic fmicroorganisms fcan fbe fsubdivided finto fgroups fsuch fas
fMastigophora, fSarcodina, fCiliophora, fand fApicomplexa? f- fanswersProtozoa
, Genetic fmaterial fcan fbe fexcised ffrom fone fchromosome fand fdirectly fintegrated finto
fanother fvia... f- fanswerstransposons
What fimmune fcell fsecretes fnumerous fcytokines fthat fhelp fto fcoordinate fthe fresponse
fof fother fimmune fcells? f- fanswersTH fcell
What fenzymes fare fused fto famplify fDNA fduring fPCR? f- fanswersDNA fpolymerase
Which fof fthe ffollowing fis fa fscientific fname? f- fanswersStreptococcus fpyogenes
Eosin-methylene fblue fagar, for fEMB, fis fa fcommonly fused fbacteriological fmedium ffor
fgrowing fgram-negative fbacteria ffrom fcomplex fenvironments. fIt fcontains ftwo fdyes,
feosin fand fmethylene fblue, fas fwell fas fthe fsugar flactose. fEosin fis fa fpH findicator fthat
fchanges fcolor fwhen fthe fmedium fis facidic, fwhile fmethylene fblue finhibits fthe fgrowth fof
fmost fgram-positive fbacteria. fIf fan forganism fconsumes flactose, facid fwill fbe fproduced,
fcausing fthe fbacterial fcolonies fto fchange fcolor.
Based fupon fthis fdescription, fthis fmedium fis f______ f- fanswersdifferential fand
fselective
A fdiagram fof fthe fthree fdomains f(Bacteria, fArchaea, fEukarya) fproceeding ffrom fthe
fLast fUniversal fCommon fAncestor fwould fshow fArchaea f- fanswersbranching foff fthe
fDomain fEukarya.
In fthe fcell fcytoplasm, fmolecules fof fATP fare fa f- fanswerssolute
The f_____ fof fthe fmicroscope fholds fand fallows fselection fof fthe fobjective flenses. f-
fanswersnosepiece
Characteristics fshared fby fall fcells finclude f- fanswersthe fpresence fof fcellular ffluid, fthe
fpossession fof fgenetic finformation, fand fa fmembrane fserving fas fa fcell fboundary.
Anything fthat foccupies fspace fand fmass fis fcalled... f- fanswersmatter
Trees fof flife fillustrate fthe fphylogenetic frelationships fof fall forganisms fwere ftraditionally
fbased fon f_____; fnewer fmethods ffor fdetermining fphylogeny frely fon f_____. f-
fanswersMorphology; fnucleic facid fsequences
Covalent fbonds f- fanswersresult ffrom fsharing felectrons
One fnucleotide fcontains fone f- fanswersphosphate, fpentose fsugar, fnitrogen fbase
Among fthe ftypes fof fmicroorganisms, fthe f___. fare fnoncellullar f- fanswersviruses
Using fmicrobes fto fdetoxify fa fsite fcontaminated fwith fheavy fmetals fis fan fexample fof
f____ f- fanswersBioremediation
2025 WITH 100% CORRECT ANSWERS
In fthe fnitrogen fcycle, fwhich fof fthe ffollowing fsteps finvolves fremoval fof fnitrogen ffrom
fthe fatmosphere fby fbacteria? f- fanswersNitrogen fFixation
If fenough fH+ fions fare fadded fto fpure fwater fto fraise fthe fH+ fconcentration fof fthe
fsolution fto ften ftimes fhigher fthan fthe foriginal fconcentration, fwhat fis fthe fresulting fOH-
fconcentration fof fthe fsolution? f- fanswers10-8 fM
Fungi fare fable fto freproduce fasexually fby fcreating fconidiospores fand
fsporangiospores. fWhich fof fthe ffollowing fis fan faccurate fexplanation ffor fwhy fit fis
fadvantageous fthat fthey fare falso fcapable fof fsexual freproduction? f- fanswersOffspring
ffrom ftwo fparents fmay fhave fvariations fin fform fand ffunction fthat fcontribute fto fsurvival
fof fthe fspecies.
In fa flaboratory fbacterial fcell fculture fthat fhas fbeen finfected fby fa fvirus, fplaques fare
fareas fin fwhich... f- fanswersthe fvirus fhas fspread fand fleft fbehind fthe fremains fof fdead
fcells.
The fsun's fenergy fis fdelivered fas fdiscrete fpackets fthat ftravel fas fwaves fand fare fcalled
f- fanswersPhotons
What fis fa fcharacteristic fof faerobic frespiration? f- fanswersThe fprocess fincludes
fglycolysis, fthe fKrebs fcycle, fand fthe felectron ftransport fchain.
In fcompleting fprotein fsynthesis fin fa fprokaryote, fwhat fbasic fmessage fis fcarried fby fa
fspecialized fcodon fthat fhas fno fcorresponding ftRNA? f- fanswers"Terminate fhere."
Microbial fdrug fresistance fcan fbe fcaused fby fmutations for fby fintroduction fof fnew
fgenes finto fa fpopulation. fWhich fof fthe ffollowing fcan fonly fbe fcaused fby fthe
fintroduction fof fnew fgenes finto fa fpopulation? f- fanswersnew fenzymes fthat finactivate
fthe fdrug fare fsynthesized
Why fdo fthe fhands, ffeet, fand fbreasts fhave fmore flymphatic fvessels ffor fhost fdefense
fthan fother fareas fof fthe fhuman fbody? f- fanswersThey fhave fa fhigh frisk ffor finfection
fdue fto ffrequent fcontact.
Penicillin ffunctions fas fan fantimicrobial fagent fby finhibiting fbacterial... f- fanswerscell
fwall fsynthesis.
Which fclass fof feukaryotic fmicroorganisms fcan fbe fsubdivided finto fgroups fsuch fas
fMastigophora, fSarcodina, fCiliophora, fand fApicomplexa? f- fanswersProtozoa
, Genetic fmaterial fcan fbe fexcised ffrom fone fchromosome fand fdirectly fintegrated finto
fanother fvia... f- fanswerstransposons
What fimmune fcell fsecretes fnumerous fcytokines fthat fhelp fto fcoordinate fthe fresponse
fof fother fimmune fcells? f- fanswersTH fcell
What fenzymes fare fused fto famplify fDNA fduring fPCR? f- fanswersDNA fpolymerase
Which fof fthe ffollowing fis fa fscientific fname? f- fanswersStreptococcus fpyogenes
Eosin-methylene fblue fagar, for fEMB, fis fa fcommonly fused fbacteriological fmedium ffor
fgrowing fgram-negative fbacteria ffrom fcomplex fenvironments. fIt fcontains ftwo fdyes,
feosin fand fmethylene fblue, fas fwell fas fthe fsugar flactose. fEosin fis fa fpH findicator fthat
fchanges fcolor fwhen fthe fmedium fis facidic, fwhile fmethylene fblue finhibits fthe fgrowth fof
fmost fgram-positive fbacteria. fIf fan forganism fconsumes flactose, facid fwill fbe fproduced,
fcausing fthe fbacterial fcolonies fto fchange fcolor.
Based fupon fthis fdescription, fthis fmedium fis f______ f- fanswersdifferential fand
fselective
A fdiagram fof fthe fthree fdomains f(Bacteria, fArchaea, fEukarya) fproceeding ffrom fthe
fLast fUniversal fCommon fAncestor fwould fshow fArchaea f- fanswersbranching foff fthe
fDomain fEukarya.
In fthe fcell fcytoplasm, fmolecules fof fATP fare fa f- fanswerssolute
The f_____ fof fthe fmicroscope fholds fand fallows fselection fof fthe fobjective flenses. f-
fanswersnosepiece
Characteristics fshared fby fall fcells finclude f- fanswersthe fpresence fof fcellular ffluid, fthe
fpossession fof fgenetic finformation, fand fa fmembrane fserving fas fa fcell fboundary.
Anything fthat foccupies fspace fand fmass fis fcalled... f- fanswersmatter
Trees fof flife fillustrate fthe fphylogenetic frelationships fof fall forganisms fwere ftraditionally
fbased fon f_____; fnewer fmethods ffor fdetermining fphylogeny frely fon f_____. f-
fanswersMorphology; fnucleic facid fsequences
Covalent fbonds f- fanswersresult ffrom fsharing felectrons
One fnucleotide fcontains fone f- fanswersphosphate, fpentose fsugar, fnitrogen fbase
Among fthe ftypes fof fmicroorganisms, fthe f___. fare fnoncellullar f- fanswersviruses
Using fmicrobes fto fdetoxify fa fsite fcontaminated fwith fheavy fmetals fis fan fexample fof
f____ f- fanswersBioremediation
