Featured in PASCO’s College Biology Instructor Guide

College Biology Instructor Guide


College Instructor edition with 26 experiments covering introductory and general biology topics.

Fermentation in Yeast

Lab Summary

Use oxygen and ethanol gas sensors to calculate and compare the rate of
fermentation in a PASCO EcoChamber containing activated yeast solution.


Yeast cells can serve as simple models for studying both aerobic respiration and fermentation. During this investigation, students:

  • Gather evidence of aerobic respiration and fermentation by yeast.
  • Determine the rates of aerobic respiration and fermentation in yeast.



Students gain experience conducting the following procedures:

  • Use the oxygen gas and ethanol sensors to gather evidence of aerobic respiration and fermentation by yeast.
  • Calculate and compare the rates of oxygen consumption and ethanol production by yeast.

Sensors / Equipment Used:

PASPORT Oxygen Gas Sensor


The Oxygen Gas Sensor accurately measures O2 concentration in the atmosphere or in enclosed spaces. Study animal, plant or cellular respiration, air quality, O2 production from chemical reactions and more.

PASPORT Ethanol Sensor


Measures the concentration of ethanol in a gas or indirectly in a liquid. It is well-suited for both continuous recording and discrete measurements. For use with PASPORT Interfaces.



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

Magnetic Stirrer


A "must-have" piece of lab equipment when doing titration experiments.

Materials Used:

Beaker, 1000-mL 
Beaker, 500-mL  
Sucrose solution, 0.5 M - 500 mL
Yeast solution - 1 liter

The Associated Bundle:

College Biology Bundle


A complete probeware bundle designed for PASCO's College Biology curriculum

Interface Required

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