Photosynthesis Lab
Lab: Cellular Respiration in Yeast
Lab Report Form
Your Name: Katlin Moore
“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.
Yeasts have been used by humans in the development of civilization for millennia. What is yeast? How have humans used yeasts? * Yeast is a fungi, it grows. Humans use much yeast in our bread today, because it makes our bread rise. *
What is sucrose? How would sucrose be used as food source for yeasts? * Sucrose is a compound, its what we use in beats and in sugar. *
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? * aerobic *
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? * Yes is does, because it is used to store sugar. Respiration uses glycose
Data Tables
| Depth of CO2 bubbles in: | Depth of CO2 bubbles in: | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | |
| Balloon description (size and circumference) | Balloon description (size and circumference) | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | |
Post-Lab Questions
1. What hypothesis did you use to answer the research question? *
What is the independent variable in the experiment? *
What is the dependent variable in the experiment? *
What is the control in this experiment? What is the purpose of the control in this experiment? *
Is there a relationship between the different amounts of carbon dioxide produced and the concentration of sucrose in the
Lab Report Form
Your Name: Katlin Moore
“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.
Yeasts have been used by humans in the development of civilization for millennia. What is yeast? How have humans used yeasts? * Yeast is a fungi, it grows. Humans use much yeast in our bread today, because it makes our bread rise. *
What is sucrose? How would sucrose be used as food source for yeasts? * Sucrose is a compound, its what we use in beats and in sugar. *
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? * aerobic *
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? * Yes is does, because it is used to store sugar. Respiration uses glycose
Data Tables
| Depth of CO2 bubbles in: | Depth of CO2 bubbles in: | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | |
| Balloon description (size and circumference) | Balloon description (size and circumference) | Sucrose Concentration | 10 minutes | 20 minutes | 0% | | | 1% | | | 5% | | | 10% | | |
Post-Lab Questions
1. What hypothesis did you use to answer the research question? *
What is the independent variable in the experiment? *
What is the dependent variable in the experiment? *
What is the control in this experiment? What is the purpose of the control in this experiment? *
Is there a relationship between the different amounts of carbon dioxide produced and the concentration of sucrose in the