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C1.2.10—Anaerobic cell respiration in yeast and its use in brewing and baking

Experiments

Here are experiments our science specialists have selected to support this IB* topic.

Fermentation with Yeast

Experiment #11 from Investigating Biology through Inquiry

In this Preliminary Activity, you will use a Gas Pressure Sensor to monitor the pressure inside a conical tube as yeast metabolizes glucose anaerobically. When data collection is complete, you will perform a linear fit on the resultant graph to determine the fermentation rate.

After completing the Preliminary Activity, you will first use reference sources to find out more about sugar fermentation by yeast before you choose and investigate a researchable question dealing with fermentation. Some topics to consider in your reference search are:

  • sugars
  • glucose
  • monosaccharides
  • disaccharides
  • fermentation
  • anaerobic respiration
  • aerobic respiration
  • yeast
  • enzyme
  • substrate
  • enzyme inhibitor

Evolution of Yeast

Experiment #22 from Investigating Biology through Inquiry

In this Preliminary Activity, you will use a CO2 Gas Sensor to determine the rate of respiration of glucose by baker’s yeast.

After completing the Preliminary Activity, you will first use reference sources to find out more about yeast strains that are used in baking and brewing before you choose and investigate a researchable question dealing with the evolution of yeast through artificial selection. Some topics to consider in your reference search are:

  • Saccharomyces cerevisiae
  • Saccharomyces bayans
  • beer yeast
  • wine yeast
  • artificial selection
  • evolution
  • baking
  • monosaccharides
  • disaccharides
  • metabolism

Educational Standard
International Baccalaureate (IB) 2025
Subject
Biology
Theme
C Interactions and interdependence
Level of organization
1 Molecules
Topic
C1.2 Cell respiration
Section
Additional higher level

* The IB Diploma Program is an official program of the International Baccalaureate Organization (IBO) which authorizes schools to offer it. The material available here has been developed independently of the IBO and is not endorsed by it.

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