Experiments
Here are experiments our science specialists have selected to support this IB* topic.
Sugar Metabolism with Yeast (Carbon Dioxide Gas)
Experiment #10A from Investigating Biology through Inquiry
In the Preliminary Activity, you will use a CO2 Gas Sensor to determine the rate of respiration of glucose by yeast.
After completing the Preliminary Activity, you will first use reference sources to find out more about sugars, respiration, and yeast before you choose and investigate a researchable question dealing with the respiration of sugars by yeast. Some topics to consider in your reference search are:
- sugars
- carbohydrates
- monosaccharides
- disaccharides
- polysaccharides
- yeast
- glycolysis
- metabolism
- aerobic respiration
- anaerobic respiration
Lactase Action
Experiment #24A from Biology with Vernier
In this experiment, you will
- Test the action of lactase.
- Use glucose test paper to monitor the presence of glucose.
- Determine if yeast can metabolize glucose, lactose, or galactose.
- Educational Standard
- International Baccalaureate (IB) 2025
- Subject
- Biology
- Theme
- C Interactions and interdependence
- Level of organization
- 1 Molecules
- Topic
- C1.1 Enzymes and metabolism
- Section
- Standard level and 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.