1. Hypothesize why some substances were not metabolized, while others were. Research the chemical formula of Equal and Splenda and explain how it would affect respiration.

2. If you have evidence of respiration, identify the gas that was produced. Suggest two methods for poistively identifying this gas.

3. How do the results of this experiment relate to the role yeast plays in baking?

4. What would you expect to see if the yeasts’ metabolism was slowed down? How coud this be done?

5. Indicate sources of error and suggest improvement