Doesmilkcontainsugarifsowhatisthenameofthesugar yes

1. Does milk contain sugar? If so, what is the name of the sugar?
2. What molecules in your body help speed up the digestion of sugar and other food
molecules?
3. Some people are lactose "intolerant." What do you think this means?
Show students a glucose test strip and explain what it does. Dip the strip into the beaker of milk. Show
students that the result is negative (no glucose is present).
4. Why is the test result negative?
5. Predict what you think the powder does, so that it allows a lactose-intolerant
person to consume milk products.
6. Is lactose a monosaccharide, disaccharide, or polysaccharide? What is the basic
structure of a lactose molecule?
Draw or show a picture of lactose to students to help discuss the question above.
After 5 minutes of stirring the beaker of milk and Lactaid, dip a second glucose test strip into the beaker
of milk. Show students that the result is positive (glucose is present).
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PS-2870B

Teacher Information
7. Why is the test result positive? (Hint: Lactaid contains the enzyme lactase.)