VIRTUAL BIOLOGY LAB · LAB 17

🥚 Food Test: Protein

Use the Biuret reaction model to detect proteins.

CBSE Classes 9–10Interactive practicalDrag & drop challengeStudent notebook

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🔎 Learning objective

Use the Biuret reaction model to detect proteins.

3Hands-on matches

1Knowledge check

🧬 Interactive laboratory workspace

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

🥚

Food Test: Protein

A violet or lilac colour indicates peptide bonds in a positive Biuret test.

PRACTICAL WORKBENCH · EXPERIMENT 17

🧪 Food-analysis bench: Run the Biuret test for protein

A lilac or purple colour indicates peptide bonds in a positive Biuret test.

Ready to begin

APPARATUS & EXPERIMENT CONTROLS

01 · Set up apparatus02 · Adjust variables03 · Run trial04 · Record reading

Food sample Sample dilution Biuret reagent

◉Colour change▤

OBSERVATION & MEASUREMENTS

Food sample—

Sample dilution—

Biuret reagent—

Protein result—Awaiting run

A lilac or purple colour indicates peptide bonds in a positive Biuret test.

Scientific interpretation will appear after the trial.

Scientific note: Add Biuret reagent carefully and compare the sample with a known protein control.

Model conditionObservation 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

Choose an item and place it in the matching zone.

📓 Observation notebook

Record your observation and export it for revision.

Key concept: A violet or lilac colour indicates peptide bonds in a positive Biuret test.

🎯 Quick knowledge check

The Biuret test detects:

Select one answer to check your understanding.

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