Business & Finance HOMEWORK

Midterm Lab Report

Cellular Respiration BIO100A

Instructions

1. Complete the Report by completing the 4 sections below.

2. The Background and Materials sections can be completed ahead of time. The Results should be completed as you perform the experiment, except for the graphing part. The Discussion should be completed when you are done with the experiment.

3. Use your own words. This way, you will avoid plagiarism issues. You will also have to understand the material well enough to put it in your own words.

4. When the Report is complete, upload it to Brightspace using the link under Week 2.

5. Please note that reports that do not contain all three required pictures will receive a grade of zero.

Section 1: Background

25 points; 200 words minimum. USE YOUR OWN WORDS.

1. Describe fermentation. You could include: a description of the process; the equation; the organisms that perform it; its importance to all living things; its importance to humans (what foods are fermented?); or anything else of personal interest to you (for example, favorite fermented foods and/or drinks, lactic acid buildup in muscles, etc.)

2. Identify the two variables you are investigating in this experiment. If you are investigating a third in Bottle 6, identify that too.

3. At the end of the background, propose a hypothesis for the experiment: in which bottles do you predict fermentation will occur best?

Section 2: Materials and Methods

25 points. 200 words minimum, 500 words maximum.

1. Identify the key materials you used. Include, for example, the brand and type of yeast, the type of water, the type of bottles, the approximate pot size, the tool you used to take measurements, or anything else that might have affected the results.

2. Briefly describe the steps you followed. Please do NOT CUT AND PASTE. This does not need to be long, just summarize what you did.

3. Identify the variable you chose for Bottle 6 in Report Table 1.

Report Table 1

Bottle	Sugar (tsp) or Alternative	Yeast amount (tsp)	Water amount (cup)	Temperature
1	1.00	2	0.25	Room Temp
2	1.00	2	0.25	Water bath
3	1.00	2	0.25	Water bath
4	0.33	2	0.25	Water bath
5	0.00	2	0.25	Water bath
6			0.25

4. Insert a picture of your experimental setup. Make sure it includes the ID card.

Picture 1 – Setup

Section 3: Results

25 points: pictures 5; tables 10; graph 10

1. Insert a picture of your experiment in progress. Make sure it includes the ID card.

Picture 2 – In Progress

2. Insert a picture of your end results. Make sure the bottles are lined up in order and that the pic includes the ID card. Picture 3 – End

3. Record your immediate observations.

Report Table 2: Immediate Observations

Bottle	Balloon size (L, M, S, no change)	Yeast growth (much, medium, little, none)	Other observations
1
2
3
4
5
6

4. Record your yeast heights.

Report Table 3: Yeast Heights

Bottle	Initial yeast height	New yeast height (cm)	Change in yeast height (cm)
1
2
3
4
5
6

5. Record your balloon measurements and volume calculations.

Report Table 4: Balloon Measurements and Volumes

Bottle	Circumference (cm)	Top to base (cm)	Radius (cm) (Top to base/3.14)	Volume (cm3) 2/19 x C x C x R
1
2
3
4
5
6

6. Prepare a graph of your results. Your graph should have clearly labeled x and y axes, as well as a legend briefly describing what the graph shows. Please read the instructions and watch the Graphing Video posted in your Brightspace course in the midterm lab section of Module 1. Insert the graph here.

Graph

7. Describe any additional information or results in a paragraph, including any potential mistakes or mishaps.

Section 4: Discussion

25 points, minimum 250 words.

Analyze your results: what effects did the variables you tested have on fermentation? Please include answers to the following questions in your discussion.

· What caused the balloons to increase in size? How is this a measure of how much fermentation occurred?

· What caused the yeast height to increase? How is this a measure of how fermentation occurred?

· What were the effects of temperature? What bottles did you compare to conclude this?

· What were the effects of sugar amount? What bottles did you compare to conclude this?

· What variable did you investigate in your Bottle 6? What did you conclude?

· Were the balloon volumes of Bottles 2 and 3 similar? If not, why might they have been different?

· If your results are not easy to explain (for example, only the balloon in Bottle 5 inflated), provide a possible explanation.

· Did anything unexpected or odd happen? Provide a possible explanation.

· Did your results support the hypothesis you proposed at the end of the Background section? Clearly explain why or why not.

· What is the importance of your results to people today?

Section 5: References

1. Please include 3 APA formatted references other than the Lab Manual. We recommend that you use them to prepare the Background or Discussion.

2. The references should be from reputable sources (peer-reviewed articles, scientific organizations, or reputable organizations). Please do not use newspapers, personal blogs, Wikipedia, or similar sites.

3. Include a citation to each reference in the appropriate section of the text. You can cite either the number of the reference (Reference #1) or the authors and year (Smith et al., 2023).