VIRTUAL BIOLOGY LAB · LAB 09
☀️ Photosynthesis: Starch Test
Explore the iodine starch test as evidence of photosynthesis.
CBSE Classes 9–10Interactive practicalDrag & drop challengeStudent notebook
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🔎 Learning objective
Explore the iodine starch test as evidence of photosynthesis.
3Hands-on matches
1Knowledge check
🧬 Interactive laboratory workspace
Explore the biological idea using the model controls. This is a conceptual classroom simulation.
☀️
Photosynthesis: Starch Test
A blue-black iodine colour indicates starch. A covered leaf area can act as a light control.
LIVE PRACTICAL · STATION 09A
Leaf not tested☀️ Test a leaf for starch
Simulate the practical sequence: destarch, expose, decolourise in a water bath and apply iodine.
EXPERIMENT SET-UP · LIGHT CONTROL
LIGHT SOURCE
The plant should be destarched before the investigation so that any starch detected is produced during the test.
STARCH TEST · PRACTICAL PROCEDURE
IODINE TEST RESULTAwaiting iodineComplete the procedure in order.
Safety: ethanol is flammable. In a real laboratory, heat ethanol only in a water bath, away from an open flame, under teacher supervision.
Model ready. Choose a condition and run the model to see an observation.
🧪 Hands-on drag & drop challenge
PRACTICAL SKILL BUILDERDrag each item from the tray to its correct destination. On a phone or tablet, tap an item and then tap its destination. Complete all three matches to finish.
🧰 MATERIALS & CONCEPTS
🎯 DROP ZONES
Choose an item and place it in the matching zone.
📓 Observation notebook
Record your observation and export it for revision.
Key concept: A blue-black iodine colour indicates starch. A covered leaf area can act as a light control.
🎯 Quick knowledge check
A positive iodine test for starch is:
Select one answer to check your understanding.
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