StudentName:______________________________Period:________Date:______________
LABORATORY EXPERIMENT
Cellular Respiration by Yeast
A.Purpose:Tounderstandconditionsthatinfluencegrowthandcellularrespirationinyeast(Saccharomyces
cerevisiae).UnderstandprocessofcellrespirationbymeasuringamountofCO2produced,andgraphresults.
PurposeQuestion:How does sugar affect the carbon dioxide production in yeast?
B.Materials:
Yeastmixturerubberbands
juice
Sugar
aluminumfoil Erlenmeyerflasks,250or500ml
GraduatedCylinders(10ml,100ml)
Largebeakerwithhotwater plasticwrap
1Balloon(round,7-10inch)
30cmstringandruler
C.Procedures:Workwithyourgrouptocreateaprocedure.Thinkabouthowyouwillmeasureifitworks.
Teacher Approval: _____________________________________
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Data Collection: use this space to record your data. This might mean that you create a table or chart.
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Procedure: Use detailed directions to write out your procedure (peanut butter jelly style!).
GRAPH….Plot your data from the lab. The independent variable goes on the X axis and the dependent
(measured) variable goes on the Y axis.
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TITLE:______________________________________________________
KEY:
Time (minutes)
Questions:
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1) Isyeastalivingcell?Howdoyouknow?_________________________________________________
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2) Whatistheequationforcellularrespiration?_______________________________________________
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3) Whichorganelledoescellularrespirationoccurin?__________________________________________
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4) Whatisthepurposeoftheballooninthislab?Whatisithelpingusmeasure?____________________
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5) Findanothergroupthatusedadifferentprocedurethanyoudid.Howdidtheirdatacompareto
yours?Whatweretheirresults?Explainthedifference._____________________________________
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6) Whatcouldhavebeendonetoincreasetherateofcellularrespiration?Explainhow:
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Conclusion:C.E.R.
PurposeQuestion:Howdoessugaraffectthecarbondioxideproductioninyeast?
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Claim:_________________________________________________________________________________
_________________________________________________________________________________Evidence:______________________________________________________________________________
Reasoning:________________________________________________________________________________
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