MCB 100 EXAM 2 I CLICKER QUESTIONS AND CORREC
What cis cthe cbasis cfor cassigning corganisms cinto cthe cthree cdifferent cdomains cof clife c(Bacteria, c
A.DNA cstructure cand clocation c
B. cPresence cof cflagella c
C. cMethod cof creproduction c
D.Type cof cstaining cused cto csee cthem c
E. crRNA cgene csequences c- cCORRECT cANS✔✔E. crRNA cgene csequences
The cbacterial carrangement cillustrated chere cis cknown cas c____ c
A. ca cchain cof cbacilli. c
B. cpalisades. c
C. cpleomorphic cgroup. c
D. ca ctetrad. c
E. ca ccluster cof ccocci. c- cCORRECT cANS✔✔A. ca cchain cof cbacilli.
Biofilm cformation cbegins cwith c_______ cA. ccells cmaturing cand cdividing. c
B. ca cslimy cpolysaccharide cmatrix cbeing csecreted. c
C. cextracellular cpolymer csubstances cclumping.
D. cfree-floating ccells cattaching cto ca csurface. c
E. ca cbunch cof ccells cclustering ctogether. c- cCORRECT cANS✔✔D. cfree-floating ccells cattaching ct
Which cof cthe cfollowing cstatements cabout cbiofilms cis cTRUE? c
A. cIn ca csingle-species cbiofilm, cthe cinterior cenvironment cis cuniform cthroughout. c
B. cThe cenvironment cof cthe cbiofilm cmatrix cis cnot cconducive cto cuptake cof ccolored cdyes. c
C. cBiofilms ccannot ccontinue cto cgrow cat clow cnutrient cconcentrations. c
D. cIn cbiofilms cthere cis coften cmetabolic ccooperation camong cbacteria. c
E. cIn cbiofilms call cthe cbacteria care cliving, cbut cthose cthat cdie care creleased cinto cthe cmedium. c- c
cbiofilms cthere cis coften cmetabolic ccooperation camong cbacteria.
Biofilms ccan cbe cfound cbenefiting cour cbodies c_______ c
A. cin cthe cintestinal ctract. c
B. cin cthe cmouth. c
C. con ccontact clenses. c
D. con creplacement cjoints. c
E. cin cthe clung ctrachea. c- cCORRECT cANS✔✔A. cin cthe cintestinal ctract.
Which cof cthe cculture ctubes cbelow ccontains cflagellated cbacteria? c- cCORRECT cANS✔✔A- cThe
Which cof cthe cfollowing ccapillaries ccontains cno cstimulant? c- cCORRECT cANS✔✔B- csome cinside
cin cthe ccontainer
, D. ccomet ctails. c
E. cporins. c- cCORRECT cANS✔✔A. cfimbriae.
A cstrain cof cthe cGram-negative cbacterium cVibrio ccholerae, cwhich ccauses cthe cdiarrheal cdisease
chas ccaused cthe cbacterium cto close cthe cability cto cproduce cfimbriae cand cso cit chas cbecome cless
cWhat cfunction chas cthis cpathogen clost? c
A. cThe cability cto cmove cfrom cone clocation cin cthe cbody cto canother. c
B. cThe cability cto cproduce cand crelease ccholera ctoxin. c
C. cThe cability cto cgrow cinside cthe chost's cintestine. c
D. cThe cability cto cescape cthe cphagosome cand center cthe ccytosol. cE. cThe cability cto cadhere cto ca
cANS✔✔E. cThe cability cto cadhere cto ca chost ccell.
Pathogenic cstrains cof cGram-positive cStaphylococcus caureus ccan cspread calong ctissue cplanes ct
cproducing cand csecreting c_______ c
A. ca cprotease ccalled cstaphylokinase. c
B. ca cprotease ccalled cexfoliative ctoxin. c
C. ca cDNA-degrading cnuclease c(DNase). cD.an cRNA-degrading cnuclease c(RNase).
E. ca cpore-forming ctoxin ccalled cstaphylolysin. c- cCORRECT cANS✔✔B. ca cprotease ccalled cexfolia
Gram-negative cHaemophilus cinfluenzae cbacteria, cwhich ccause crespiratory cand cear cinfections, c
cbecause c_______ c
A. cthey cneed cheme cto cbuild ctheir cextracellular ccapsules. c
B. cthey cneed cheme cto cadhere cto ctissue ccells. c
C. cthey cneed cheme cto cbind cto ciron cso cthey ccan ctransport ciron cinside cthem. c
D. cthey crecognize cheme cas ca cchemoattractant cso cthey ccan cmove ctoward cnutrients. c
E. cthey cneed cheme cto cincorporate cit cinto ctheir cDNA. c- cCORRECT cANS✔✔C. cthey cneed chem
ctransport ciron cinside cthem.
Which cof cthe cfollowing cis ca cprimary cadvantage cfor ca cbacterium chaving cthe cability cto cinvade ca
A. cThe cbacteria cdo cnot cneed ctheir cflagella cto cmove cfrom cone clocation cto canother.
B. cThe cbacteria ccan ccolonize cand cform cbiofilms cinside cthe ccell.
C. cMultiple cbacteria ccan cuse cthe chost ccell cas ca ccompartment cto cexchange cDNA cwith ceach cot
D. cThe chost ccell ccan cshield cthe cbacteria cfrom cviruses cand cparasites.
E. cThe cbacteria ccan chide cand cbe cprotected cfrom cantibodies cand cimmune ccells. c- cCORRECT c
chide cand cbe cprotected cfrom cantibodies cand cimmune ccells.
A cstrain cof cthe cGram-negative cbacterium cShigella cflexneri, cwhich ccauses cthe cdisease cdysente
cmutation cthat chas ccaused cthe cbacterium cto close cthe cability cto cproduce ca cpore-forming ctoxin c
cphagocytic cmembranes cand cso cit chas cbecome cless cvirulent cas ca cconsequence. cWhat cfunctio
A. cThe cability cto cmove cfrom cone clocation cin cthe cbody cto canother. c
B. cThe cability cto cproduce cand crelease cneurotoxin. c
C. cThe cability cto cgrow cinside cthe chost's cintestine. c
D. cThe cability cto cescape cthe cphagosome cand center cthe ccytosol.
E. cThe cability cto cadhere cto ca chost ccell. c- cCORRECT cANS✔✔D. cThe cability cto cescape cthe cph
ccytosol.
Lipid cA cis c______ cthat cstimulates cthe cbody cto crelease chormone-like cchemicals c(called ccytokin
cinflammation, cdiarrhea, chemorrhaging, cshock, cand cblood ccoagulation. c
A. ca ccytotoxin csecreted cby cbacteria cinto cthe cmedium c
B. can cendotoxin cfound cin cbacterial cmembranes c
C. can cextracellular cmatrix-degrading cprotease c
D. can cexotoxin csecreted cby cbacteria cinto cthe cmedium c
E. ca cmembrane cpore-forming cbacterial ctoxin c- cCORRECT cANS✔✔B. can cendotoxin cfound cin cb
Which cof cthe cfollowing cbacterial cvirulence cfactors cdirectly ccontributes cto csevere cinflammation?
What cis cthe cbasis cfor cassigning corganisms cinto cthe cthree cdifferent cdomains cof clife c(Bacteria, c
A.DNA cstructure cand clocation c
B. cPresence cof cflagella c
C. cMethod cof creproduction c
D.Type cof cstaining cused cto csee cthem c
E. crRNA cgene csequences c- cCORRECT cANS✔✔E. crRNA cgene csequences
The cbacterial carrangement cillustrated chere cis cknown cas c____ c
A. ca cchain cof cbacilli. c
B. cpalisades. c
C. cpleomorphic cgroup. c
D. ca ctetrad. c
E. ca ccluster cof ccocci. c- cCORRECT cANS✔✔A. ca cchain cof cbacilli.
Biofilm cformation cbegins cwith c_______ cA. ccells cmaturing cand cdividing. c
B. ca cslimy cpolysaccharide cmatrix cbeing csecreted. c
C. cextracellular cpolymer csubstances cclumping.
D. cfree-floating ccells cattaching cto ca csurface. c
E. ca cbunch cof ccells cclustering ctogether. c- cCORRECT cANS✔✔D. cfree-floating ccells cattaching ct
Which cof cthe cfollowing cstatements cabout cbiofilms cis cTRUE? c
A. cIn ca csingle-species cbiofilm, cthe cinterior cenvironment cis cuniform cthroughout. c
B. cThe cenvironment cof cthe cbiofilm cmatrix cis cnot cconducive cto cuptake cof ccolored cdyes. c
C. cBiofilms ccannot ccontinue cto cgrow cat clow cnutrient cconcentrations. c
D. cIn cbiofilms cthere cis coften cmetabolic ccooperation camong cbacteria. c
E. cIn cbiofilms call cthe cbacteria care cliving, cbut cthose cthat cdie care creleased cinto cthe cmedium. c- c
cbiofilms cthere cis coften cmetabolic ccooperation camong cbacteria.
Biofilms ccan cbe cfound cbenefiting cour cbodies c_______ c
A. cin cthe cintestinal ctract. c
B. cin cthe cmouth. c
C. con ccontact clenses. c
D. con creplacement cjoints. c
E. cin cthe clung ctrachea. c- cCORRECT cANS✔✔A. cin cthe cintestinal ctract.
Which cof cthe cculture ctubes cbelow ccontains cflagellated cbacteria? c- cCORRECT cANS✔✔A- cThe
Which cof cthe cfollowing ccapillaries ccontains cno cstimulant? c- cCORRECT cANS✔✔B- csome cinside
cin cthe ccontainer
, D. ccomet ctails. c
E. cporins. c- cCORRECT cANS✔✔A. cfimbriae.
A cstrain cof cthe cGram-negative cbacterium cVibrio ccholerae, cwhich ccauses cthe cdiarrheal cdisease
chas ccaused cthe cbacterium cto close cthe cability cto cproduce cfimbriae cand cso cit chas cbecome cless
cWhat cfunction chas cthis cpathogen clost? c
A. cThe cability cto cmove cfrom cone clocation cin cthe cbody cto canother. c
B. cThe cability cto cproduce cand crelease ccholera ctoxin. c
C. cThe cability cto cgrow cinside cthe chost's cintestine. c
D. cThe cability cto cescape cthe cphagosome cand center cthe ccytosol. cE. cThe cability cto cadhere cto ca
cANS✔✔E. cThe cability cto cadhere cto ca chost ccell.
Pathogenic cstrains cof cGram-positive cStaphylococcus caureus ccan cspread calong ctissue cplanes ct
cproducing cand csecreting c_______ c
A. ca cprotease ccalled cstaphylokinase. c
B. ca cprotease ccalled cexfoliative ctoxin. c
C. ca cDNA-degrading cnuclease c(DNase). cD.an cRNA-degrading cnuclease c(RNase).
E. ca cpore-forming ctoxin ccalled cstaphylolysin. c- cCORRECT cANS✔✔B. ca cprotease ccalled cexfolia
Gram-negative cHaemophilus cinfluenzae cbacteria, cwhich ccause crespiratory cand cear cinfections, c
cbecause c_______ c
A. cthey cneed cheme cto cbuild ctheir cextracellular ccapsules. c
B. cthey cneed cheme cto cadhere cto ctissue ccells. c
C. cthey cneed cheme cto cbind cto ciron cso cthey ccan ctransport ciron cinside cthem. c
D. cthey crecognize cheme cas ca cchemoattractant cso cthey ccan cmove ctoward cnutrients. c
E. cthey cneed cheme cto cincorporate cit cinto ctheir cDNA. c- cCORRECT cANS✔✔C. cthey cneed chem
ctransport ciron cinside cthem.
Which cof cthe cfollowing cis ca cprimary cadvantage cfor ca cbacterium chaving cthe cability cto cinvade ca
A. cThe cbacteria cdo cnot cneed ctheir cflagella cto cmove cfrom cone clocation cto canother.
B. cThe cbacteria ccan ccolonize cand cform cbiofilms cinside cthe ccell.
C. cMultiple cbacteria ccan cuse cthe chost ccell cas ca ccompartment cto cexchange cDNA cwith ceach cot
D. cThe chost ccell ccan cshield cthe cbacteria cfrom cviruses cand cparasites.
E. cThe cbacteria ccan chide cand cbe cprotected cfrom cantibodies cand cimmune ccells. c- cCORRECT c
chide cand cbe cprotected cfrom cantibodies cand cimmune ccells.
A cstrain cof cthe cGram-negative cbacterium cShigella cflexneri, cwhich ccauses cthe cdisease cdysente
cmutation cthat chas ccaused cthe cbacterium cto close cthe cability cto cproduce ca cpore-forming ctoxin c
cphagocytic cmembranes cand cso cit chas cbecome cless cvirulent cas ca cconsequence. cWhat cfunctio
A. cThe cability cto cmove cfrom cone clocation cin cthe cbody cto canother. c
B. cThe cability cto cproduce cand crelease cneurotoxin. c
C. cThe cability cto cgrow cinside cthe chost's cintestine. c
D. cThe cability cto cescape cthe cphagosome cand center cthe ccytosol.
E. cThe cability cto cadhere cto ca chost ccell. c- cCORRECT cANS✔✔D. cThe cability cto cescape cthe cph
ccytosol.
Lipid cA cis c______ cthat cstimulates cthe cbody cto crelease chormone-like cchemicals c(called ccytokin
cinflammation, cdiarrhea, chemorrhaging, cshock, cand cblood ccoagulation. c
A. ca ccytotoxin csecreted cby cbacteria cinto cthe cmedium c
B. can cendotoxin cfound cin cbacterial cmembranes c
C. can cextracellular cmatrix-degrading cprotease c
D. can cexotoxin csecreted cby cbacteria cinto cthe cmedium c
E. ca cmembrane cpore-forming cbacterial ctoxin c- cCORRECT cANS✔✔B. can cendotoxin cfound cin cb
Which cof cthe cfollowing cbacterial cvirulence cfactors cdirectly ccontributes cto csevere cinflammation?
