Meal Mix Up Lab Report
Firstly, I placed 20 drops of each stomach content into the five different tubes. Next, I placed three drops of iodine solution into each tube. Then, I observed the result, if it changed color to brown then dark purple or black, it contained starches. Solutions two, four, and five had a positive result for polysaccharides.
After that, I preformed the Biuret test, which sees if a substance contains proteins. I first placed 5 drops of each stomach content into the appropriately labeled tube. Next, I added one drop of Biuret solution into each tube. Then, I recorded the result, if the substance changed purple then it contained proteins. Only stomach two and three had a positive trace of protein.
With these results I was able to conclude that stomach content one belongs to Margaret Little, who ate a bag of Skittles and ice tea with honey, because it contained only monosaccharides. Content two belongs to Lucy Wunderchomper, who ate a Big Mac Value Meal supersized with an extra order of supersized fries and a shake, because it contained protein, starch, lipids, and monosaccharides. Stomach content three belongs to Davis O'Leary, who consumed a very lean steak and a glass of water, because I only contained protein. Stomach four belongs to U. R. Downs, who ate plain spaghetti, because it only contained starches. Finally, Stomach content five belongs to Wendell Sputz, who ate a bag of jelly beans and a baked potato, because it contained monosaccharides and