Enzyme Lab Report

1676 WordsAug 18, 20137 Pages
The purpose of the enzyme lab conducted was to observe the chemical composition of cells. In order to do so we tested for the presence of organic molecules. Molecules are what forms when atoms bond together. Organic molecules of cells include proteins, carbohydrates, and lipids, which are composed of smaller molecules known as monomers and polymers. Polymers are joined monomers. A chemical reaction links monomers together occurs and releases a water molecule, this is called dehydration synthesis. Hydrolysis separates polymers into monomers by using water to break bonds. Organic catalysts called enzymes are proteins that increase the speed of a chemical reaction. In the lab we used Biuret reagent to test for proteins, iodine solution to…show more content…
When Benedict’s reagent was added to the glucose solution it turned to a dark orange-red, indicating a high sugar concentration. Next we added Benedict’s reagent to the starch solution which remained blue, indicating no sugar presence. The onion juice also turned a red-orange color as a reaction to the addition of Benedict’s reagent indicating a very high sugar concentration. Lastly, when Benedict’s reagent was added to potato juice a yellow-orange color was visible, indicating a moderate concentration of sugar. Our following experiment of the lab tested for lipids. We placed a drop of water on a piece of brown paper and a drop of water on a separate piece of brown paper. Observation after allowing the drops to sit on the paper for 15 minutes included that the water remained bead on the paper and subject to evaporation indicating the absence of lipids. On the other hand, the oil drop sample was absorbed by the paper and the paper became translucent. To further study lipids, we experimented with the emulsification of lipids. An emulsifier has both polar and non polar ends, which change the polarity and causes fat to disperse in water. Two test tubes were used. The first was marked at three and four centimeters. The second labeled at one three and four centimeters. In tube one we added water to the three centimeters, and filled oil to the marking on the center tube and shook the tube. The results expected were confirmed and the two remained as they

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