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Yeast Metabolism Lab

Yeast Metabolism Lab. Mrs. Zimmerman 10/22/10. Photosynthesis. 6 CO 2 + 6 H 2 O  C 6 H 12 O 6 + 6 O 2. Energy from sunlight. Respiration. Cellular Respiration. Carbon Dioxide. Glucose. Water. Oxygen. Energy. C 6 H 12 O 6 + 6 O 2  6 CO 2 + 6 H 2 O + energy. Yeast.

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Yeast Metabolism Lab

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  1. Yeast Metabolism Lab Mrs. Zimmerman 10/22/10

  2. Photosynthesis 6 CO2 + 6 H2O C6H12O6 + 6O2 Energy from sunlight

  3. Respiration

  4. Cellular Respiration Carbon Dioxide Glucose Water Oxygen Energy C6H12O6 + 6O2 6 CO2 + 6 H2O + energy

  5. Yeast • Unicellular • Eukaryotic (like us) • Kingdom Fungi • Hetero-trophic (like us) • Can produce energy anaerobically (without O2) -> called “Fermentation” Saccharomyces cerevisiae

  6. Alcoholic Fermentation • Some organisms, including yeast, can create energy without oxygen, but produce the toxin ethanol as a by-product. Beer and wine Bread

  7. Alcoholic Fermentation

  8. What happened there? Yeast + C6H12O66 CO2 + ethanol + energy The alcohol gets burned off when bread bakes, which is why it’s ok to eat.

  9. Back to the lab… Yeast + C6H12O66 CO2 + ethanol + energy Dependent variable Independent variable

  10. Hypothesis • Make a prediction about which treatment will produce the most carbon dioxide… • Yeast + water? *Control • Yeast + glucose? • Yeast + Splenda?

  11. Graphing your results Circumference of Balloon (cm) Water GLUCOSE SPLENDA

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