Featured in PASCO’s College Biology Instructor Guide
College Instructor edition with 26 experiments covering introductory and general biology topics.
Aerobic Respiration of Yeast
Use a water quality sensor to measure the effects of temperature on the dissolved oxygen concentration of active yeast cultures.
In this activity, students investigate how to:
- Calculate the rate of oxygen consumption of yeast during aerobic cellular respiration.
- Use rate of oxygen consumption as a measure of the rate of aerobic cellular respiration in yeast at varying temperatures.
- Identify a control group, and independent, dependent, and constant variables in an experiment.
Students will gain experience conducting the following procedures
- Measuring the dissolved oxygen concentration of a sugar solution before and after adding an activated yeast solution.
- Measuring the dissolved oxygen concentration of diluted sugar solutions at varying temperatures. They will use the temperature probe before and after adding the activated yeast solution.
Sensors / Equipment Used:
Measures temperature, conductivity, pH/ISE/ORP and dissolved oxygen. It is specifically designed for convenience in conducting water quality lab experiments. For use with PASPORT Interfaces.
Activated yeast solution - 45 mL
Beaker, 250-mL - 3
Distilled or deionized water - 1 L
Electronic Balance - 1 per class
Graduated cylinder, 100-mL
Ice bath, 1 L beaker filled with ice water
Sugar - 30 g
Weighing paper - 3
The Associated Bundle:
A complete probeware bundle designed for PASCO's College Biology curriculum