GBBE Final Exam With Correct Questions
And Answers 2024
Gram-positive dbacteria d- dcorrect danswer.Bacteria dthat dhave da dthick dpeptidoglycan dcell
dwall, dand dno douter dmembrane. dThe dcell dwall dcontains dteichoic dacid d(regulates dthe
dmovement dof dpositive dions). dThey dstain dvery ddarkly d(purple) din dGram dstain.
Gram-negative dbacteria d- dcorrect danswer.Bacteria dthat dhave dcomplex dcell dwalls dwith
dless dpeptidoglycan dbut dwith dlipopolysaccharides.
They dstain dvery dbright dpink din dGram dstain.
Safranin dstain d- dcorrect danswer.Added das dthe dcounter/secondary dstain din da dGram dStain
dwhich dcolor dthe dgram dnegative dbacteria dpink-red dand dhave dno deffect don dgram dpositive
dbacteria.
Endotoxin d- dcorrect danswer.A dtoxic dcomponent dof dthe douter dmembrane dof dcertain dgram-
negative dbacteria dthat dis dreleased donly dwhen dthe dbacteria ddie.
Exotoxin d- dcorrect danswer.A dtoxic dprotein dthat dis dsecreted dby da dprokaryote dor dother
dpathogen dand dthat dproduces dspecific dsymptoms, deven dif dthe dpathogen dis dno dlonger
dpresent.
What dis da dmordant? d- dcorrect danswer.a dsubstance, dtypically dan dinorganic doxide, dthat
dcombines dwith da ddye dor dstain dand dthereby dfixes dit din da dmaterial.
(for dex. diodine)
Purpose dof diodine d- dcorrect danswer.binds dto dprimary dstain dand dallows dfor dsubstance dto
dbecome dtrapped din dthe dcell dwall
Three dprimary dshapes dof dbacteria d- dcorrect danswer.cocci, dbacillus, dspiral
Capsule d- dcorrect danswer.Protects dcell, dmakes dit dmore dvirulent
Pilus d- dcorrect danswer.short dhair-like dstructures don dcell dsurface d(help dw/ dadherence dto
dstructures dand dmovement)
peptidoglycan d- dcorrect danswer.A dprotein-carbohydrate dcompound dthat dmakes dthe dcell
dwalls dof dbacteria drigid d(contains dtwo dmonosaccharides- dNAG dand dNAM
, Plasma dmembrane d- dcorrect danswer.A dselectively-permeable dphospholipid dbilayer
dforming dthe dboundary dof dthe dcells
Primary dchromosome d- dcorrect danswer.circular dDNA dmolecules din dbacteria
Plasmid d- dcorrect danswer.small, dextrachromosomal dDNA dmolecule dwithin da dcell dthat dis
dphysically dseparated dfrom dchromosomal dDNA
Fimbriae d- dcorrect danswer.long dfilamentous dpolymeric dprotein dstructures dlocated dat dthe
dsurface dof dbacterial dcells; denable dthe dbacteria dto dbind dto dspecific dreceptor
dstructures/colonize dsurfaces
Slime dlayer d- dcorrect danswer.a dglycocalyx dthat dis dunorganized dand dloosely dattached dto
dthe dcell dwall
Starch dhydrolysis dtest d- dcorrect danswer.iodine dis dadded dto dagar.. dif dstarch dis dpresent,
dforms da ddark dbrown dcolor. dHydrolysis dof dstarch dwill dcreate da dclear dzone daround dthe
dbacterial dgrowth.
Motility dtest d- dcorrect danswer.Non-motile- dsharp dand ddefined dline, dmotile- dswim daway
dfrom dstab dline, dis dnot dconcentrated dto dline dof dinoculation
MacConkey dtest d- dcorrect danswer.gram dpositive dcannot dgrow, dwhen dit dferments dlactose
d(becomes dacidic, dred), dwhen dit ddoesn't dferment dlactose d(remains dcolorless)
Catalase dtest d- dcorrect danswer.all dbacteria dthat dcarry dout daerobic drespiration d(create
dhydrogen dperoxide) dare dcatalase-positive d(bubbles dare dcreated)
Fermentation dtest d- dcorrect danswer.produces denergy dand dformation dof dacids d(reduce
dpH, dcolor dchanges dfrom dred dto dyellow)
MSA d- dcorrect danswer.positive dindicates dsalt dtolerant dand dfermentation dof dmannitol
d(yellow).. dif dno dgrowth dbut dferments dmannitol d(pink).. dif dno dgrowth dand dno dferment
dmannitol d(red)
Skim dmilk dtest d- dcorrect danswer.tests dability dof dorganism dto dproduce dexoenzyme dcalled
dcasease d(hydrolyzes dcasein)... donly dworks dfor dbacillus dunder d2 dmicrons don dlength...
douter dcasing dwhen dpositives
EMB dtest d- dcorrect danswer.toxic dfor dgram dpositive d(colorless-lactose dnegative, dpurple
dand dgreen-lactose dpositive)
Spirit dblue dtest d- dcorrect danswer.only dfor dgram dpositive dbacillus d(lipase dpositive-zone dof
dclearance)
Bacteria dform d- dcorrect danswer.circular, dirregular, dfilamentous, drhizoids
And Answers 2024
Gram-positive dbacteria d- dcorrect danswer.Bacteria dthat dhave da dthick dpeptidoglycan dcell
dwall, dand dno douter dmembrane. dThe dcell dwall dcontains dteichoic dacid d(regulates dthe
dmovement dof dpositive dions). dThey dstain dvery ddarkly d(purple) din dGram dstain.
Gram-negative dbacteria d- dcorrect danswer.Bacteria dthat dhave dcomplex dcell dwalls dwith
dless dpeptidoglycan dbut dwith dlipopolysaccharides.
They dstain dvery dbright dpink din dGram dstain.
Safranin dstain d- dcorrect danswer.Added das dthe dcounter/secondary dstain din da dGram dStain
dwhich dcolor dthe dgram dnegative dbacteria dpink-red dand dhave dno deffect don dgram dpositive
dbacteria.
Endotoxin d- dcorrect danswer.A dtoxic dcomponent dof dthe douter dmembrane dof dcertain dgram-
negative dbacteria dthat dis dreleased donly dwhen dthe dbacteria ddie.
Exotoxin d- dcorrect danswer.A dtoxic dprotein dthat dis dsecreted dby da dprokaryote dor dother
dpathogen dand dthat dproduces dspecific dsymptoms, deven dif dthe dpathogen dis dno dlonger
dpresent.
What dis da dmordant? d- dcorrect danswer.a dsubstance, dtypically dan dinorganic doxide, dthat
dcombines dwith da ddye dor dstain dand dthereby dfixes dit din da dmaterial.
(for dex. diodine)
Purpose dof diodine d- dcorrect danswer.binds dto dprimary dstain dand dallows dfor dsubstance dto
dbecome dtrapped din dthe dcell dwall
Three dprimary dshapes dof dbacteria d- dcorrect danswer.cocci, dbacillus, dspiral
Capsule d- dcorrect danswer.Protects dcell, dmakes dit dmore dvirulent
Pilus d- dcorrect danswer.short dhair-like dstructures don dcell dsurface d(help dw/ dadherence dto
dstructures dand dmovement)
peptidoglycan d- dcorrect danswer.A dprotein-carbohydrate dcompound dthat dmakes dthe dcell
dwalls dof dbacteria drigid d(contains dtwo dmonosaccharides- dNAG dand dNAM
, Plasma dmembrane d- dcorrect danswer.A dselectively-permeable dphospholipid dbilayer
dforming dthe dboundary dof dthe dcells
Primary dchromosome d- dcorrect danswer.circular dDNA dmolecules din dbacteria
Plasmid d- dcorrect danswer.small, dextrachromosomal dDNA dmolecule dwithin da dcell dthat dis
dphysically dseparated dfrom dchromosomal dDNA
Fimbriae d- dcorrect danswer.long dfilamentous dpolymeric dprotein dstructures dlocated dat dthe
dsurface dof dbacterial dcells; denable dthe dbacteria dto dbind dto dspecific dreceptor
dstructures/colonize dsurfaces
Slime dlayer d- dcorrect danswer.a dglycocalyx dthat dis dunorganized dand dloosely dattached dto
dthe dcell dwall
Starch dhydrolysis dtest d- dcorrect danswer.iodine dis dadded dto dagar.. dif dstarch dis dpresent,
dforms da ddark dbrown dcolor. dHydrolysis dof dstarch dwill dcreate da dclear dzone daround dthe
dbacterial dgrowth.
Motility dtest d- dcorrect danswer.Non-motile- dsharp dand ddefined dline, dmotile- dswim daway
dfrom dstab dline, dis dnot dconcentrated dto dline dof dinoculation
MacConkey dtest d- dcorrect danswer.gram dpositive dcannot dgrow, dwhen dit dferments dlactose
d(becomes dacidic, dred), dwhen dit ddoesn't dferment dlactose d(remains dcolorless)
Catalase dtest d- dcorrect danswer.all dbacteria dthat dcarry dout daerobic drespiration d(create
dhydrogen dperoxide) dare dcatalase-positive d(bubbles dare dcreated)
Fermentation dtest d- dcorrect danswer.produces denergy dand dformation dof dacids d(reduce
dpH, dcolor dchanges dfrom dred dto dyellow)
MSA d- dcorrect danswer.positive dindicates dsalt dtolerant dand dfermentation dof dmannitol
d(yellow).. dif dno dgrowth dbut dferments dmannitol d(pink).. dif dno dgrowth dand dno dferment
dmannitol d(red)
Skim dmilk dtest d- dcorrect danswer.tests dability dof dorganism dto dproduce dexoenzyme dcalled
dcasease d(hydrolyzes dcasein)... donly dworks dfor dbacillus dunder d2 dmicrons don dlength...
douter dcasing dwhen dpositives
EMB dtest d- dcorrect danswer.toxic dfor dgram dpositive d(colorless-lactose dnegative, dpurple
dand dgreen-lactose dpositive)
Spirit dblue dtest d- dcorrect danswer.only dfor dgram dpositive dbacillus d(lipase dpositive-zone dof
dclearance)
Bacteria dform d- dcorrect danswer.circular, dirregular, dfilamentous, drhizoids
