The Relationship Between Food Concentration, And Respiratory Activity
The Relationship Between Food Concentration, and Respiratory Activity
In this experiment different concentrations of sucrose were tested to determine
which leads to the most respiratory activity in yeast. Yeast is a heterotrophic
anaerobic fungus which lacks chlorophyll. Yeast is used commercially to
ferment the sugars of wheat, barley, and corn to produce alcohol, and in the
baking industry to raise or expand dough. Yeast or alcoholic fermentation is
the anaerobic process of respiration by which sugars, such as glucose and
sucrose, are converted into ethanol and carbon dioxide (CO2 ). This process is
illustrated in the following equation:
yeast C12H22O11 + H2O
---> 4 CH3CH2OH + 4 CO2
sucrose + water (yields) ethanol + carbon dioxide
In order to determine what concentration of sucrose and water leads to
the most respiratory activity, ten large test tubes were set with different
concentrations......
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Approximate Word Count: 452
Approximate Pages: 2 (250 words per double-spaced page)
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