Biomolecule and tox data
Thu, Sep 17, 2026 · Week 4 · Principles of Biomedical Technology (Principles of Biomedical Science)
Today's goal: Run biomolecule indicator tests following an SOP and collect data on unknown samples.
What a finished product looks like
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
Indicator-test data (controls run alongside unknowns):
- Positive control for sugar turned brick red; negative control (distilled water) stayed blue, confirming the reagent works.
- Unknown 1 turned brick red with Benedict's and violet with Biuret, so it tested positive for reducing sugar and protein.
Dilution series: As concentration increased from 1 percent to 8 percent, the observed effect grew, showing a dose-response trend.
Limitation: A pigment in Unknown 2 made the color hard to read. Contamination risk: I used a fresh dropper for each tube to avoid false positives.
| Sample | Benedict's | Lugol's | Biuret | Sudan IV |
|---|---|---|---|---|
| Positive control | Brick red | Blue-black | Violet | Red layer |
| Negative control | Blue | Yellow-brown | Blue | No red |
| Unknown 1 | Brick red | Yellow-brown | Violet | No red |
Also due today: Upload a photo of your completed data tables to the tracker before leaving class.
WebXam problem for today's skill
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.