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VIRTUAL BIOLOGY LAB · LAB 02

🧅 Onion Peel Cell Study

Observe rectangular onion epidermal cells and identify their structures.

CBSE Classes 9–10Interactive practicalDrag & drop challengeStudent notebook
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🔎 Learning objective

Observe rectangular onion epidermal cells and identify their structures.

3Hands-on matches
1Knowledge check

🧬 Interactive laboratory workspace

Explore the biological idea using the model controls. This is a conceptual classroom simulation.

🧅
Onion Peel Cell Study
A typical onion epidermal cell shows a cell wall, membrane, cytoplasm, nucleus and large vacuole.
LIVE PRACTICAL · STATION 02A

🔬 Prepare & examine an onion epidermal slide

Work through the wet-mount procedure, then operate the microscope to inspect the specimen.

Slide not prepared
SPECIMEN PREPARATION TRAY
GLASS SLIDE

Step 1: Use forceps to peel a very thin transparent layer from the inner surface of an onion scale leaf.

Follow the preparation sequence in order. Each step changes the slide.

COMPOUND MICROSCOPE · OBSERVATION STATION
Total magnification100×
Image clarityAdjust focus
Prepare the slide first. Start with the low-power objective, then focus.
Model ready. Choose a condition and run the model to see an observation.

🧪 Hands-on drag & drop challenge

PRACTICAL SKILL BUILDER

Drag 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

📓 Observation notebook

Record your observation and export it for revision.

Key concept: A typical onion epidermal cell shows a cell wall, membrane, cytoplasm, nucleus and large vacuole.

🎯 Quick knowledge check

Which structure gives a plant cell a firm outline?

Select one answer to check your understanding.
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