food science bread dough challenge - utah state university · food science: bread dough challenge...
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FoodScience:BreadDoughChallengeDidyouknowthatyeastisactuallyalive?Inthebread-makingprocess,itisaliveuntiltheheatoftheovenkillsit.Yeastisacommonleaveningagentusedtomakebreadandotherbakeryproducts.Thefirstuseofyeasttobakebreadisunknown,buttheearliestdefiniterecordscomefromAncientEgypt.
Whatmakesbreaddoughrise?
Howdoyeastcellsgetenergy?
Whatfactorsspeedorslowtheprocessofdoughrising?
Whatisyeast?
PuttingtheScienceinContext
Plantsconvertenergyfromthesunthroughphotosynthesis.
Organismsuseoxygentoperformaerobic cellularrespiration,which
createsATP(energy).
Bacteria,archaea,yeastandmusclecellscanperformanaerobic
respirationwithoutoxygenthroughfermentation.
Remember,allliving
organismsneedenergy!
1. Whichziploc bag(s)expanded?Why?
2. Whatgasdidtheyeastproduce?
3. Whatmoleculedoestheyeastuseforenergy?
4. Whattypeofcellularrespirationdoyeastcellsuse?Howdoyouknow?
5. Howdoyouthinkyoucouldmakethisreactionfasterorslower?
BreadDoughChallengeHowcanyoumakethefastestrisingbreaddough?
1. Listasmanyvariablesyoucanthinkofthatcouldaffectrisingtime.
2. Whatvariablewillyourgrouptest?
3. Howwillyoureviseyourrecipetotestthisvariable?
4. Makeahypothesisbelowabouthowmanipulatingthisvariablewillimpactthefinaloutcomeofthebreaddough.
1/3 cup warm water
1 tablespoon sugar
1 teaspoon yeast
1 cup flour
1 teaspoon oil
Bread Dough
1. In a bowl, mix together the yeast, warm water, and sugar.
2. Add the oil and flour and stir to combine.
3. Knead dough for 2 minutes.
4. Roll dough into a ball and place in a glass jar for observation.
Quick-RisingBread Dough
FoodScienceTeamRecommendation:
1. Usingalltheresultsfromyourexperiment,placethebestrecipeandpreparationinstructionsintherecipecardabove.
2. Provideascientificanalysisbelowforyourrecommendationexplainingwhyitisthebestprocedureformakingquick-risingbreaddough.