Lab: Cellular Respiration in Yeast

Topics: Carbon dioxide, Cellular respiration, Oxygen Pages: 2 (350 words) Published: June 24, 2013
Lab: Cellular Respiration in Yeast
Lab Report Form

Your Name:

“What do you think? – What do you know?” Questions:

In this lab, we will investigate the effect of sucrose concentration on the rate of cellular respiration in yeast. Under specific conditions, yeast will convert sucrose into glucose and then use this glucose in cellular respiration.

1.Yeasts have been used by humans in the development of civilization for millennia. What is yeast? How have humans used yeasts? They are most common in baking as Yeast bubbles in warm water causing the yeast to rise. (Yeast produces a waste most commonly called Alcohol and it is also a fungi)so humans used yeast for alcohol, and also bread.

2.What is sucrose? How would sucrose be used as food source for yeasts? Sucroses is a white powder, also known as (sugar).Because it grows on sucroses faster, and it feeds upon it rite away.

3.If you grow yeast in a sealed test tube filled with water and a food source, do you think these growth conditions are aerobic or anaerobic? I think it would be (aerobic).

4.The purpose of this lab is to answer the research question: “Does the concentration of sucrose affect the rate of cellular respiration in yeast?” What do you think? I think yes, because yeast is used to store sugar, Respiration uses glycose.

Data Tables

Depth of CO2 bubbles in:Depth of CO2 bubbles in:
Sucrose Concentration10 minutes20 minutes
0%
1%
5%
10%

Balloon description (size and circumference)Balloon description (size and circumference) Sucrose Concentration10 minutes20 minutes
0%
1%
5%
10%

Post-Lab Questions

1.What hypothesis did you use to answer the research question?

2.What is the independent variable in the experiment?

3.What is the dependent variable in the experiment?

4.What is the control in this experiment? What is the purpose of the control in this experiment?

5.Is there a relationship between the different amounts...
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