Describe thereproductionof theyoghurtbacteriaBinaryfission and atypicalgrowth curveHow do weevaluatetheyoghurt?pH value,smell,appearance,taste, textureWhat abioticand abioticfactors affectyoghurtproduction?Give examplessuch as type ofbacteria, pH,amount oflactose,temperature...What wasteproduct isexcreted by thebacteria duringfermentation?LacticacidWhat isyoghurt?AfermentedmilkproductWhathappensto the pHand why?The pHdecreasesas lactose isconverted tolactic acidWrite thetypicalprocess forproducingyoghurtHeat milk to killbacteria, cool milkto ~40C, addstarter culture,incubate for 4-8hours, pack andstore at 5CHow doesheating themilk affectthe milkproteins?The milk proteinsget damaged bythe heat(denaturation)and can form afirmer coagulumHow can weproduce afirmer andmore tartyoghurt?Use morestarterculture orferment forlongerWhat are thetypical pHvalues ofmilk andyoghurt?Milk is6.8, andyoghurt is4.5Whatmicroorganismsare used?LactobacillusbulgaricusandStreptococcusthermophilusWhathappens tostarter culturegrowth as thepH drops?BacterialgrowthdecreasesWrite thereactionfor energyproductionLactose(sugar) -->Lactic acid+ energyWhy isyoghurt putin the fridgefor storage?To minimiseany furtherfermentationGiveexamples ofMRS GRENfor yoghurtproductionGive examplesfor 2-3 MRSGREN meanings,e.g., Growth,reproduction andrespirationWhat type offermentationis used?Anaerobicfermentation,i.e., in theabsence ofoxygenWhathappenedwith differentmilks?Soy milkmade a weakyoghurt whileoat milk didnot workWhy is milkusuallyheatedbefore cultureis added?To kill anyunwantedbacteriaWhathappenedwith differentamounts ofculture?More cultureresulted in afirmer yoghurtas morebacteria werepresentCan we makeyoghurt at lowand hightemperatures?Yes, but thecultures willtake longerto growDescribe thereproductionof theyoghurtbacteriaBinaryfission and atypicalgrowth curveHow do weevaluatetheyoghurt?pH value,smell,appearance,taste, textureWhat abioticand abioticfactors affectyoghurtproduction?Give examplessuch as type ofbacteria, pH,amount oflactose,temperature...What wasteproduct isexcreted by thebacteria duringfermentation?LacticacidWhat isyoghurt?AfermentedmilkproductWhathappensto the pHand why?The pHdecreasesas lactose isconverted tolactic acidWrite thetypicalprocess forproducingyoghurtHeat milk to killbacteria, cool milkto ~40C, addstarter culture,incubate for 4-8hours, pack andstore at 5CHow doesheating themilk affectthe milkproteins?The milk proteinsget damaged bythe heat(denaturation)and can form afirmer coagulumHow can weproduce afirmer andmore tartyoghurt?Use morestarterculture orferment forlongerWhat are thetypical pHvalues ofmilk andyoghurt?Milk is6.8, andyoghurt is4.5Whatmicroorganismsare used?LactobacillusbulgaricusandStreptococcusthermophilusWhathappens tostarter culturegrowth as thepH drops?BacterialgrowthdecreasesWrite thereactionfor energyproductionLactose(sugar) -->Lactic acid+ energyWhy isyoghurt putin the fridgefor storage?To minimiseany furtherfermentationGiveexamples ofMRS GRENfor yoghurtproductionGive examplesfor 2-3 MRSGREN meanings,e.g., Growth,reproduction andrespirationWhat type offermentationis used?Anaerobicfermentation,i.e., in theabsence ofoxygenWhathappenedwith differentmilks?Soy milkmade a weakyoghurt whileoat milk didnot workWhy is milkusuallyheatedbefore cultureis added?To kill anyunwantedbacteriaWhathappenedwith differentamounts ofculture?More cultureresulted in afirmer yoghurtas morebacteria werepresentCan we makeyoghurt at lowand hightemperatures?Yes, but thecultures willtake longerto grow

Yoghurt Bingo - Call List

(Print) Use this randomly generated list as your call list when playing the game. There is no need to say the BINGO column name. Place some kind of mark (like an X, a checkmark, a dot, tally mark, etc) on each cell as you announce it, to keep track. You can also cut out each item, place them in a bag and pull words from the bag.


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  1. Binary fission and a typical growth curve
    Describe the reproduction of the yoghurt bacteria
  2. pH value, smell, appearance, taste, texture
    How do we evaluate the yoghurt?
  3. Give examples such as type of bacteria, pH, amount of lactose, temperature...
    What abiotic and abiotic factors affect yoghurt production?
  4. Lactic acid
    What waste product is excreted by the bacteria during fermentation?
  5. A fermented milk product
    What is yoghurt?
  6. The pH decreases as lactose is converted to lactic acid
    What happens to the pH and why?
  7. Heat milk to kill bacteria, cool milk to ~40C, add starter culture, incubate for 4-8 hours, pack and store at 5C
    Write the typical process for producing yoghurt
  8. The milk proteins get damaged by the heat (denaturation) and can form a firmer coagulum
    How does heating the milk affect the milk proteins?
  9. Use more starter culture or ferment for longer
    How can we produce a firmer and more tart yoghurt?
  10. Milk is 6.8, and yoghurt is 4.5
    What are the typical pH values of milk and yoghurt?
  11. Lactobacillus bulgaricus and Streptococcus thermophilus
    What microorganisms are used?
  12. Bacterial growth decreases
    What happens to starter culture growth as the pH drops?
  13. Lactose (sugar) --> Lactic acid + energy
    Write the reaction for energy production
  14. To minimise any further fermentation
    Why is yoghurt put in the fridge for storage?
  15. Give examples for 2-3 MRS GREN meanings, e.g., Growth, reproduction and respiration
    Give examples of MRS GREN for yoghurt production
  16. Anaerobic fermentation, i.e., in the absence of oxygen
    What type of fermentation is used?
  17. Soy milk made a weak yoghurt while oat milk did not work
    What happened with different milks?
  18. To kill any unwanted bacteria
    Why is milk usually heated before culture is added?
  19. More culture resulted in a firmer yoghurt as more bacteria were present
    What happened with different amounts of culture?
  20. Yes, but the cultures will take longer to grow
    Can we make yoghurt at low and high temperatures?