Macromolecule Lab

Lab Safety and Setup00:00:00

Preparation for the lab, including safety equipment and labeling eight test tubes for different testing stations such as Benedict's, Biuret, and iodine tests.

Benedict's Test (Simple Sugars)00:01:38

Explanation of the Benedict's test to detect simple sugars like glucose, requiring a hot water bath where a color change to orange or red indicates a positive result.

Biuret Test (Proteins)00:05:39

Instructions for the Biuret test, which uses three drops of the indicator to detect proteins; a positive result is identified by the solution turning a lavender or purplish color.

Iodine Test (Starches)00:07:18

Testing for starches using iodine, which must be kept away from light. A color shift to dark blue or black indicates the presence of starch.

Lipid Test (Paper Bag Test)00:08:44

A non-tube test for lipids using a brown paper towel; a positive result is confirmed if the paper becomes transparent when held up to light.

Unknown Food Sample and Stomach Contents Analysis00:10:25

Procedures for applying these four tests to an unknown food sample and to Anna Garcia's stomach contents to identify their chemical composition.

Cleanup Procedures00:13:53

Proper disposal instructions for chemical waste, ensuring that reagents are placed into their specifically labeled waste containers before cleaning the lab station.