The purpose of this lab is to determine the presence of glucose, starch, and protein in various samples through standard tests. Solution 1: Formula I believe formula will test positive for sugar and protein since it is supposed to be a nutritious, balanced drink for infants. Materials and Methods: Please refer to the Biology 1406 Lab Manual Pg. 43 Test For| Coloration/
Appearance of Positive Control| Coloration/ Appearance of Negative Control| Sol. 1 Result (+ or -)| Comments| Reducing Sugars (tube 1)| Opaque Orange| Stays Blue| +| Strong in sugar content| Starch (tube 2)| Bluish Black| Orange-Yellow| -| None| Proteins(tube 3)| Purple| Light Blue| +| None| Results: Conclusion: I tested the solution with Benedict’s, Iodine, and Biuret’s to determine what it contains. Formula tested positive for sugar and protein which proved my hypothesis to be correct. Solution #2: Chicken Broth
Chicken broth will test positive for protein and starch because chickens have a high content of protein in their eggs and meat. Materials and Methods: Please refer to the Biology 1406 Lab Manual Pg. 43 and 44 Results: Test For| Coloration/ Appearance of Positive Control| Coloration/ Appearance of Negative Control| Sol. 2 Result (+ or -)| Comments| Reducing Sugars (tube 4)| Opaque Orange| Stays Blue| +| Slow change in color from green to orange| Starch (tube 5)| Bluish Black| Orange-Yellow| +| Quick change| Proteins tube 6)| Purple| Light Blue| +| Quick Change| Conclusion: I tested the solution with Benedict’s, Iodine, and Biuret’s to determine what it contains. Chicken broth tested positive for reducing sugars, starch and proteins.
The Essay on Testing for the Presence of Starches
... is pinkish purple, or purple, then the test for protein is positive. The test solution for starches is yellowish brown. If any substance that ... 5 drops of Biuret Reagent were added to the test tubes. The test tubes were mixed by shaking them. Results were recorded according ... tests for proteins. This result matched the hypothesis, given that the water is a pure substance, sucrose is a non starch sugar. ...
Part of my hypothesis was proved wrong because the solution did contain sugar. Solution 3: Lemon-Lime Soda Lemon-Lime Soda will test positive for reducing sugars because it’s made with a high content of sugar meant to give a person more energy. Materials and Methods: Please refer to the Biology 1406 Lab Manual Pg.
