Yeast lab Part 1

Input your data on this link


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

Yeast Lab

Video from today

https://www.documentaryarea.tv/player.php?title=Cooked:%20Air

Questions


1)From the movie, what are the organisms that “fart in the balloons”?

2)What material is the “balloon” made of?

3)Why are yeast important to bread production?

4)What are the purposes of photosynthesis and respiration?

5)Define metabolism in your own words. What is the point of metabolism?

6)Based on what you have learned so far in the simulations and movie, do all living organisms need gasses for metabolism?

7)Do all living organisms require O2 gas to convert food (glucose) into energy?

Cellular Respiration

When you are done with the video, get a Chromebook and complete Activity B: Cellular Respiration.  This is due at the end of the period.

You can use any remaining time to pick up your assignments and study for the Lab test on Monday!

Lab Test for Monday

The lab test on Monday will cover the following

• Enzymes (enzyme POGIL)
• Photosynthesis (POGIL and Class notes))
• Photosynthesis lab practices and interpreting graphs/data (STEM exercise)
• Cellular Respiration (POGIL and Gizmo)

Photosynthesis