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Investigating Lactose Intolerance

Kit #802
Investigating Lactose Intolerance

Students are first introduced to lactose-intolerance and its cause. Next, they work in pairs to test whole milk and lactose-free milk for the presence of glucose. They find that glucose is present in lactose-free milk but is not present in whole milk. They then add lactase to the whole milk, retest it for glucose, and discover that it now contains glucose.

Details at a Glance

  • 1-2 Days | 1-2 ~50 minute class periods
  • 3 Activities
  • Accommodates 1 class, with 16 groups of 2 students
  • Consumables service 32 students
  • Meets our criteria for supporting literacy
  • Requires a water source

Scientific Concepts

•Enzymes, such as lactase that breaks down lactose (into glucose and galactose), are essential to life processes.
•Lactose needs to be broken down in order to be digested by humans.
•Individuals who lack certain enzymes can experience uncomfortable and/or dangerous symptoms.
•Controls are essential components of the scientific process.
Key Vocabulary: Control, Enzyme, Glucose, Lactase, Lactose, Lactose intolerance

Guides & Student Sheets

Our kits and modules provide you with everything you need so you can open, review, and teach the material confidently the next day.

  • Full downloadable Teacher Guide with background information, detailed instruction, example data and answers
  • Downloadable Student Sheets with age appropriate background information, full procedure(s), and analysis questions
  • All materials necessary to carry out the investigation
  • Safety Data Sheets

Kit Components

  • 96 Glucose test strips
  • 32 Tasting cups
  • 16 Well plates
  • 16 Droppers
  • 4 15-mL bottles of glucose test solution
  • 4 15-mL bottles of water (shipped empty)
  • 4 15-mL bottles of lactase solution (shipped as powder)
  • 32 Student Worksheet and Guides
  • 1 Teacher's Guide
  • 1 Safety Data Sheet packet
  • Not included and needed for instruction: At least 50 mL of whole milk and 50 mL of lactose-free milk, paper towels.