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PROBIOTICS MCB6424 EXAM 3- QUESTIONS WITH CORRECT ANSWERS 2025

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PROBIOTICS MCB6424 EXAM 3- QUESTIONS WITH CORRECT ANSWERS 2025

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Uploaded on: March 9, 2025
Number of pages: 15
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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probiotics mcb6424 exam 3 questions with correct

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PROBIOTICS MCB6424 EXAM 3- QUESTIONS
WITH CORRECT ANSWERS 2025
microbiotavvsvmicrobiomev-vCORRECTvANSWERv-microbiotav-vorganisms

microbiomev-vorganismsv+vgenesv+vgenome

Thevgutvmicrobiotavcontainsvmorevthanv__vcells

morevthanv__vspeciesv-vCORRECTvANSWERv-200vtrillionvcells

>1000vspecies

Thevmicrobiomevcontainsv__xvthevcellsvinvthevhumanvbody

Thevgutvmicrobiomevisv__xvlargervthanvthevhumanvgenomev-vCORRECTvANSWERv-10xvcells

150xvgenome

Whovcamevupvwithvthevofficialvdefinitionvofvmicrobiota?v-vCORRECTvANSWERv-
LederbergvandvMcCray,v2001

Microbiotavdefinitionv-vCORRECTvANSWERv-
"Ecologicalvcommunityvofvcommensal,vsymbiotic,vandvpathogenicvmicroorganismsvwithinvavbodyvspacevorv
othervenvironment"

True/Falsevthevmicrobiomevisvgenerallyvnon-pathogenicvandvbeneficialvtovthevhostv-vCORRECTvANSWERv-
true

Transientvmicrobiotav-vCORRECTvANSWERv-
microbesvthatvarevpresentvforvvariousvperiodsvandvthenvdisappear

Althoughvthesevtypesvofvorganismsvmayvcolonizevavhostvandvreproducevbriefly,vthevdefensesvofvthevbodyvd
ovnotvallowvthemvtovbecomevpermanent.

3vtypesvofvSymbiosisv-vCORRECTvANSWERv-mutualism,vcommensalism,vparasitism

, Commensalismv-vCORRECTvANSWERv-
onevorganismvbenefitsvthevothervandvthevothervisvunaffectedv(ex:vmycobacteriavinvthevear)

mutualismv-vCORRECTvANSWERv-bothvorganismsvbenefitv(ex:vE.vcolivinvthevcolon,vsynthesizesvvitvK)

parasitismv-vCORRECTvANSWERv-onevbenefitsvatvthevexpensevofvthevotherv(ex:vdiseasevcausingvbacteria)

___vplaysvavfundamentalvrolevinvimmunevmaturationv-
vcompletevabsencevofvbacteriavinvthevgutvresultsvinv___vandvlowvlevelsvofv____v-vCORRECTvANSWERv-

mutualism

resultsvinvgut-associatedvmesentericvlymphvtissuev

lowvlevelsvIgA

Specificvfunctionsvofvthevmicrobiotav-vCORRECTvANSWERv-
sealvbodyvspaces,vmitigatevintestinalvpathogens,vmaintainvtissuevhomeostasis,vfacilitatevfermentationvofvdi
etaryvfiberv(pectin,vetc),vcriticalvenergyvyield,vmetabolicvendvproductsvandvtherapeuticvdrugvprocessing,vsig
nalingvamongvcellsvandvorganvsystemsv(butyratev-venergyvforvgutvepithelialvcells;vacetatevandvpropionatev-
vlipogenesisvand

methodsvtovstudyvthevmicrobiotav-vCORRECTvANSWERv-16SvrRNAvgenevsequencing-
basedvsurveysvandvshotgunvmetagenomicvapproach

16SvrRNAvgenevsequencing-basedvsurveysv-vCORRECTvANSWERv-
Genevcontainsvhighlyvconservedvregionsvandvvariablevregions

amplifyv16SvrRNAvgenesvusingvprimersvdirectedvatvconservedvregionsvbutvflankingvvariablevregions

alignvgenevsequences,vresolvevphylogeneticvrelationshipsvatvdifferentvdepths

Mostv16SvrRNAvsequencesvcomevfromvpreviouslyv____v-vCORRECTvANSWERv-undescribedvmicrobes

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