iodine test, the Benedict test, and the biuret test. In the iodine test, starch and glycogen are the polysaccharides that can be identified if the test is done properly, (Harisha, 2006). A positive control will give a positive result at the conclusion of this experiment. In the case of the iodine test, this positive control is a change in colour when a polysaccharide of starch or glycogen is present. The solution used for this test is a very pale yellow and will turn blue-black when starch is present
Abstract: To use chemical reagents to test for simple sugars and starch, proteins, and fats in the multiple procedure lab. Important equipment that was involved in this experiment included the chemical reagents such as Benedict’s reagent and Lugol’s solution for carbohydrates, Sudan IV indicator for lipids and Biuret reagent for proteins because these reagents determined the colour change for each solution in order to identify the macromolecule. With the use of Benedict’s reagent, solutions that were positive
Chemical Tests By: Jennifer Park Partner: Meredith Commins Georgia Perimeter College Biology 2107 Lab Professor: Dr. Thomas Oh Introduction In this experiment, the three out of four major organic molecules were studied: carbohydrates, lipids, and proteins. The purpose of the experiment was to familiarize the methods for identifying and distinguishing different organic molecules using several tests and chemicals. Each organic molecule has a specific test to chemically
not put anything in the cell except the starch and the amylase. If the size of the molecule was too big, the molecule needed transport protein to help it pass through the membrane, but the membrane was just a dialysis tubing, and it did not have transport protein. Also, according to the effect of the activity, the starch inside the cell had turned into navy blue. This was a proof of the iodine diffusing into the cell because iodine could react with starch chemically by changing color. If the iodine