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 7
1.
2.
3.
4.
5.
6.
What was the gas in the bag?
What do the yeast use energy for?
What did the yeast smell like?
Why?
What do the yeast use sugar for?
Do you think there is more, less, or the same
amount of sugar now in the bag?
Conclusion: