Macromolecule Mystery

To begin the class, we did white board activities regarding the notes we took for homework.
Then, we moved on to the Macromolecule Lab.

Macromolecule Mystery

The object of the lab was to find out who stole Jerell's iPod by testing 5 substances and 5 foods that contained those substances to see which matched the dry and liquid evidences.

Procedure

1. First, we placed small amounts of vegetable oil, glucose, starch, egg whites, all mixed with a tiny bit of water, and water into small containers of a plastic tray.
2. Next, we placed a drop of each substance onto a paper bag to test for lipids.
3. Then, we placed each substance into a tube with 10 drops of Benedict's to test for glucose.
4. After, we placed iodine in each of the substances to test for starch.
5. Finally, we placed biuret in each of the substances to test for protein.
6. We then repeated this process except instead of the substances, we used 5 different foods: pretzels, butter, jelly, fat-free yogurt, beans, and the dry part of Jerell's evidence, and the liquid part of Jerell's evidence.

Results/Conclusion

The results for the substances are as follows:





The results for the foods are as follows:





Thus, we found the thief to be Kiara because her pretzel was the only substance with starch and nothing else, while the evidences had only starch and nothing else.