Cellular Respiration Lab

Problem: What are the products of cellular respiration and fermentation?

Background:

Hypothesis:

Procedure:1.Disolve 1 heaping teaspoon of sugar in 75 ml

of warm water.2.Add 1 “tasterspoon” of yeast to a ziploc plastic

bag.3.Add the sugar solution to the bag and seal.4.Mix the solution together.5.Label the bag with your name.6.Set bag in container and let set for an hour.7.Observe results.8.Return bag to container to set overnight days.

Data Analysis: 1.What was the gas in the bag?2.What would you expect to happen to the

concentration of the sugar in the bag? Why?3.What are the yeast cells using energy for?4.If we can keep the bag sealed, and air-tight, so

no oxygen gets in, what do you expect to happen?

5.What are the products of cellular respiration?6.What is the purpose of cellular respiration?

Period 71. What was the gas in the bag?2. What do the yeast use energy for?3. What did the yeast smell like?4. Why?5. What do the yeast use sugar for?6. Do you think there is more, less, or the same

amount of sugar now in the bag?

Conclusion: