Questions
•According to your data, do yeast need to be living to undergo fermentation and produce CO2? How do you know? Use evidence from the lab.
• According to your data, do yeast need to metabolize sugar to undergo fermentation? How do you know? Use evidence from the lab.
•According to your data, do yeast require O2 or CO2 gasses to metabolize sugar? How do you know? Use evidence from the lab.
•How was gas production measured in this experiment? What might be a more accurate way to determine what gas is produced and how much?
•Would yeast who use cellular respiration make fluffy bread or bubbly beer like fermentation-yeast do? Why not
•What is the point of fermentation and cellular respiration? Is one better than the other? Why
Data Analysis
- Based on the results for all the student groups in your class, can support your conclusion that yeast undergo a biological process called alcoholic fermentation?
- Were the results similar for all the cups with living yeast in sugar water? If not, what could be the reasons for any differences in results?
- Based on the experiment, what factors do you think are required for yeast to thrive
- According to the class data, live yeast needed to undergo fermentation and produce CO2? Write a ClEvR statement using evidence from the lab
- According to the class data, do yeast need to metabolize sugar to undergo fermentation? Write a ClEvR statement using evidence from the lab
1st period
|
Live
Yeast Plain Water
|
Living
Yeast Sugar Water
|
Dead
Yeast Sugar Water
|
|
0
|
15
|
0
|
|
1
|
40
|
0
|
|
0
|
10
|
0
|
|
4.5
|
11
|
0
|
|
0
|
10
|
0
|
|
3
|
15
|
1
|