Featured in PASCO’s College Environmental Science Instructor Guide

College Environmental Science Instructor Guide


College Instructor edition with experiments covering introductory and general environmental science topics.

Yeast Respiration

Lab Summary

Use a dissolved oxygen sensor, a carbon dioxide sensor, and the EcoChamber™ to analyze aerobic and anaerobic respiration by yeast cells.


Students use yeast cells as a simple model for studying both aerobic and anaerobic cellular respiration. As part of this investigation, they:

  • Analyze evidence of aerobic and anaerobic respiration by yeast cells.
  • Discuss the role of cellular respiration in the carbon and oxygen cycles.
  • Explain the role yeast cells play in scientific exploration.


Students gain experience conducting the following procedures:

  • Creating a closed-system for collecting and interpreting data collected by CO2 gas and dissolved oxygen sensors.
  • Using a microscope to observe and describe yeast cells.

Sensors / Equipment Used:

PASPORT Water Quality Sensor


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.

PASPORT Carbon Dioxide Gas Sensor


The PASPORT Carbon Dioxide Gas Sensor measures carbon dioxide concentration CO2 (parts per million) in gases such as air. Ideal for studies of photosynthesis, respiration, fermentation and more.



A single polycarbonate chamber designed to integrate sensors for controlled-environment experiments such as fermentation and plant or cricket respiration.

Materials Used:

Activated baker's yeast, 7-g packet 
Beaker, 1 L 
Graduated cylinder, 500-mL or 1-L 
Hot plate with magnetic stirrer and stir bar
Magnetic stir plate with stir bar 
Microscope slide and cover slip 
Microscope with magnification to 400x
Pipet, disposable 
Sugar - 100 g
Water - 1 L

The Associated Bundle:

College Environmental Science Sensor Bundle


Contains the probeware needed to perform all 26 experiments in the College Environmental Science instructor guide.

Interface Required

This experiment may require software and an interface for data collection.