MCB4422 PROBIOTICS EXAM QUESTIONS
WITH CORRECT ANSWERS 2025
OnevofvthevearliestvexamplesvofvfermentedvfoodsvisvBulgarianvyoghurt,vcommonlyvknownvasv________v-
vCORRECTvANSWERv-sourvmilk
2vbacterialvspeciesvcommonlyvseenvinvyoghurtv(i.e.vBulgarianvyoghurt)v-vCORRECTvANSWERv-
Lactobacillusvbulgaricus,vStreptococcusvthermophilus
Inv1899,vthevgenusv________vwasvidentifiedvasvavtherapeuticvusevforvtreatingvinfantvdiarrheav-
vCORRECTvANSWERv-bifidobacteria
Inv1907,vMetchnikoffvproposedvthatvacid-
producingvbacteriavinvfermentedvmilkvproductsvcouldvpreventv________vinvthevlargevintestinevand,vifvconsu
medvregularly,vleadvtovavlonger,vhealthiervlifev-vCORRECTvANSWERv-fouling
Inv1930svJapan,vyogurtvproductv"Yakult"vwasvmadevbyvfermentingvskimmedvmilkvwithvspecialvstrainvofv___
_______v-vCORRECTvANSWERv-Lactobacillusvcaseivshirota
"Probiotics"vcomesvfromvthevLatinvorvGreekv"ProvBios"vmeaningv_________v-vCORRECTvANSWERv-
Beforevlife
MostvcommonvgeneravofvProbioticsv-vCORRECTvANSWERv-Lactobacillus,vStreptococcus,vBifidobacterium
LessvcommonvgeneravofvProbioticsv-vCORRECTvANSWERv-
Enterococcus,vBacillus,vSaccharomyces,vPropionibacterium
Domain,vPhylum,vClass,vOrdervofvLABv-vCORRECTvANSWERv-Bacteria,vFirmicutes,vBacilli,vLactobacillales
LABvgenusvfoundvinvmeatvcuringvbrinesv-vCORRECTvANSWERv-Aerococcus
LABvgenusvderivedvfromvnonaciduricvlactobacillivthatvgrowvinvmeatsv-vCORRECTvANSWERv-Carnobacterium
, LABvgenus;vpreviouslyvgroupvDvstreptococci;vopportunisticvpathogen;vintestinalvorganism;vpossiblevprobiot
icv-vCORRECTvANSWERv-enterococcus
LABvgenus;vwidespreadvintestinalv&vextraintestinalvorganism;vfoodvfermentationsv-vCORRECTvANSWERv-
Lactobacillus
LABvgenus;vpreviouslyvgroupvNvstreptococci;vstartervculturevforvmostvcheesesv-vCORRECTvANSWERv-
Lactococcus
LABvgenus;vmalolacticvfermentationvofvwinev-vCORRECTvANSWERv-Oenococcus
LABvgenus;vmeatvpreservationv&vspoilage;vsugarvspoilagev-vCORRECTvANSWERv-Leuconostoc
LABvgenus;vinvolvedvinvmeatvfermentation,vbeervspoilagev-vCORRECTvANSWERv-Pediococcus
LABvgenus;vmainlyvpathogens,vothervthanvS.vThermophilusvwhichvisvusedvinvcheesev&vyoghurtvmakingv-
vCORRECTvANSWERv-Streptococcus
LABvgenus;vpreviouslyvPediococcus;vusedvinvsoyvsaucevproductionv-vCORRECTvANSWERv-Tetragenococcus
LABvgenus;vmotilevstreptococciv-vCORRECTvANSWERv-Vagococcus
LABvgenus;vnewvgenusvincludingvspeciesvofvLactobacillusv&vLeuconostoc;vassociatedvwithvmeatsv&vothervfo
odsv-vCORRECTvANSWERv-Weissella
PhenotypicvclassificationvofvLABv(basedvonvfermentationvtype)vdoesvnotvmatchv_______-basedvphylogenyv-
vCORRECTvANSWERv-rrna
Largest,vmostvheterogenousvgenusvofvLABv-vCORRECTvANSWERv-Lactobacillus
WITH CORRECT ANSWERS 2025
OnevofvthevearliestvexamplesvofvfermentedvfoodsvisvBulgarianvyoghurt,vcommonlyvknownvasv________v-
vCORRECTvANSWERv-sourvmilk
2vbacterialvspeciesvcommonlyvseenvinvyoghurtv(i.e.vBulgarianvyoghurt)v-vCORRECTvANSWERv-
Lactobacillusvbulgaricus,vStreptococcusvthermophilus
Inv1899,vthevgenusv________vwasvidentifiedvasvavtherapeuticvusevforvtreatingvinfantvdiarrheav-
vCORRECTvANSWERv-bifidobacteria
Inv1907,vMetchnikoffvproposedvthatvacid-
producingvbacteriavinvfermentedvmilkvproductsvcouldvpreventv________vinvthevlargevintestinevand,vifvconsu
medvregularly,vleadvtovavlonger,vhealthiervlifev-vCORRECTvANSWERv-fouling
Inv1930svJapan,vyogurtvproductv"Yakult"vwasvmadevbyvfermentingvskimmedvmilkvwithvspecialvstrainvofv___
_______v-vCORRECTvANSWERv-Lactobacillusvcaseivshirota
"Probiotics"vcomesvfromvthevLatinvorvGreekv"ProvBios"vmeaningv_________v-vCORRECTvANSWERv-
Beforevlife
MostvcommonvgeneravofvProbioticsv-vCORRECTvANSWERv-Lactobacillus,vStreptococcus,vBifidobacterium
LessvcommonvgeneravofvProbioticsv-vCORRECTvANSWERv-
Enterococcus,vBacillus,vSaccharomyces,vPropionibacterium
Domain,vPhylum,vClass,vOrdervofvLABv-vCORRECTvANSWERv-Bacteria,vFirmicutes,vBacilli,vLactobacillales
LABvgenusvfoundvinvmeatvcuringvbrinesv-vCORRECTvANSWERv-Aerococcus
LABvgenusvderivedvfromvnonaciduricvlactobacillivthatvgrowvinvmeatsv-vCORRECTvANSWERv-Carnobacterium
, LABvgenus;vpreviouslyvgroupvDvstreptococci;vopportunisticvpathogen;vintestinalvorganism;vpossiblevprobiot
icv-vCORRECTvANSWERv-enterococcus
LABvgenus;vwidespreadvintestinalv&vextraintestinalvorganism;vfoodvfermentationsv-vCORRECTvANSWERv-
Lactobacillus
LABvgenus;vpreviouslyvgroupvNvstreptococci;vstartervculturevforvmostvcheesesv-vCORRECTvANSWERv-
Lactococcus
LABvgenus;vmalolacticvfermentationvofvwinev-vCORRECTvANSWERv-Oenococcus
LABvgenus;vmeatvpreservationv&vspoilage;vsugarvspoilagev-vCORRECTvANSWERv-Leuconostoc
LABvgenus;vinvolvedvinvmeatvfermentation,vbeervspoilagev-vCORRECTvANSWERv-Pediococcus
LABvgenus;vmainlyvpathogens,vothervthanvS.vThermophilusvwhichvisvusedvinvcheesev&vyoghurtvmakingv-
vCORRECTvANSWERv-Streptococcus
LABvgenus;vpreviouslyvPediococcus;vusedvinvsoyvsaucevproductionv-vCORRECTvANSWERv-Tetragenococcus
LABvgenus;vmotilevstreptococciv-vCORRECTvANSWERv-Vagococcus
LABvgenus;vnewvgenusvincludingvspeciesvofvLactobacillusv&vLeuconostoc;vassociatedvwithvmeatsv&vothervfo
odsv-vCORRECTvANSWERv-Weissella
PhenotypicvclassificationvofvLABv(basedvonvfermentationvtype)vdoesvnotvmatchv_______-basedvphylogenyv-
vCORRECTvANSWERv-rrna
Largest,vmostvheterogenousvgenusvofvLABv-vCORRECTvANSWERv-Lactobacillus