MODEL
Virtual food-test bench
Predict four tests across six samples and a control.
Model
Add iodine solution.
Predict, then run the test.
Distilled water is a negative control; a known positive checks the method and reagent. Keep volumes and treatment comparable.
Predefined sample composition. Real food extracts may mask colours or need preparation. Practical work requires supervision.
Explain what you observed
How can you isolate the effect of one factor?
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Connect this activity with your lesson notes and chapter practice.
Read a related learning guide →Practise Biological Molecules →Open the student notes folder ↗Concepts and sources
Chapter extension: selected concepts, not complete syllabus coverage.
Read the supporting source ↗PMDC curriculum ↗Questions and explanations are original teaching material; these are not official exam questions.