TEST BANK FOR MICROBIOLOGY
c c c
c FUNDAMENTALS A CLINICAL APPROACH
c c c
c3RD EDITION BY COWAN
c c c
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Chapter c1 cIntroduction cto cMicrobes cand cTheir cBuilding cBlocks c(McGraw cHill)-Homework
1. Which cof cthe cfollowing cchoices cis ca ccorrect cway cto cdenote cthe cbinomial cname
cof ca cmicroorganism?
Multiple cChoice
• Staphylococcus cAureus c(correct canswer)
Explanation
The cbinomial, cor cscientific cname, cof ca cmicroorganism cmust cbe ctyped cin citalics cor cunderlined cif
chandwritten. cIn caddition, cthe cfirst cletter cof cthe cgeneric cpart cof cthe cname cmust cbe ccapitalized cwhile
cthe cfirst cletter cof cthe cspecies cname cis clowercase.
2. Which cof cthe cfollowing cis ca cmacromolecule cthat cassembles cinto cbilayers?
Multiple cChoice
• Phospholipid c(correct canswer)
• Nucleic cacid
• Carbohydrate
• Protein
3. Please cwatch cthe cvideo cbelow, cand cthen cuse cwhat cyou chave clearned cfrom cthe cchapter cto
canswer cthe cquestions, cdemonstrating cyour cunderstanding cof cbiofilms.
1.) What cis ca cbiofilm?
• Free-floating cbacteria cthat cmove cthrough cthe cblood cto cother csites
• A cgroup cof cbacteria cthat caccumulate cin clayers cand csecrete cprotective
cextracellular cmaterial
• A clayer cof csugars cthat cpersist ceven cafter cbacteria chave cbeen ckilled cby cantibiotics
• A cbacterial ccell cthat csecretes can cextensive cnetwork cof cfibers caround cits ccell cwall cIncorrect
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2. ) cWhich cof cthe cfollowing cis can cexample cof ca cbiofilm ccommonly cfound cin cthe chuman cbody?
• Dental cplaque cCorrect
• Salivary csecretions
• Ear cwax
• Yellow cor cgreen cdischarge
3.) cWhy care cbiofilms cimportant cin cinfectious cdisease?
• Bacteria cin cbiofilms care coften cprotected cfrom cantibiotics.
• Most cmicrobes ccannot ccause cdisease cwithout cother cmicrobes cpresent.
• The csecreted cextracellular c"gunk" cis chighly cdamaging cto ctissues.
Explanation
Question c1: cBacteria cattach cto ca csurface cand cexcrete ca csticky cextracellular csubstance. cOther cspecies
ccan cbe crecruited cto cthe cbiofilm, cand cthe cresult cis clayers cof cmultiple cspecies cof cbacterial csurrounded
cby ca cprotective ccoating.
Question c2: c Dental cplaque cis ca cbiofilm con cthe csurface cof cyour cteeth!
Question c3: cAntibiotics care coften cblocked cby cthe cprotective ccoating cfound cin cbiofilms. cAlso,
cbacteria cmay cexpress cdifferent cgenes cwhen cthey care cpart cof ca cbiofilm cand cbecome cless csusceptible
cto cantimicrobial cdrugs.
4. Match cthe cmacromolecules cto ctheir cfunction cwithin ccells.
Major cstructural ccomponent cof ccell Carbohydrates Correct
walls cMajor ccomponent cof ccell
c Lipids
c Correct
membranes
c
Speed cup cand cfacilitate cchemical creactions
cwithin ccells
Proteins Correct
Inheritance cand cexpression cof cgenetic ctraits Nucleic cacids Correct
Explanation
DNA cand cRNA care cnucleic cacids cinvolved cin cgenetics. cEnzymes care cproteins cthat cspeed cup cchemical
creactions. cPhospholipids cmake cup cthe cbulk cof cthe ccell cmembrane, cand cseveral cdifferent ctypes cof
ccarbohydrates cmake cup cthe ccell cwall cin corganisms cthat cpossess cone.
5. Microbes care cfound cin cwhich chabitat(s)?
All cof cchoices care ccorrect c(Ocean, cEarth’s ccrust, cand cHuman cBody)
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