Read the experiment and formulate a hypothesis predicting which substances will show a positive reaction to this assay. (Refer to specific substances rather than tube numbers) Procedure 0 Label four clean test tubes, and mark the tubes at the 1 cm level. 0 Shake the experimental solutions thoroughly to mix contents before dispensing them into the test tubl 0 Once all components have been added to the test tubes, cover the top of the tube with a piece of Parah'n and swirl to mix. 0 Tube 1: Distilled water 0 Add distilled water to the 1 cm mark. 0 Add five drops of the Biuret reagent. Swirl to mix. Record the color in Table 1. 0 Tube 2: Albumin (egg white) 0 Add albumin to the 1 cm mark. 0 Add five drops of the Biuret reagent. Swirl to mix. Record the color in Table 1. 0 Tube 3: Pepsin (enzyme) 0 Add pepsin to the 1 cm mark. 0 Add five drops of the Biuret reagent. Swirl to mix. Record the color in Table 1. 0 Tube 4: Starch 0 Add starch to the 1 cm mark. 0 Add five drops of the Biuret reagent. Swirl to mix. Record the color in Table 1. Table 1: Assay for Protein (See the PowerPoint presentation \"Organic Molecules The Results\" Contents Color Result: Ne_ative -