Proteins and Starches

The purpose of this lab Is to become more familiar with the organic molecules of proteins and starches. In addition, we will also learn the process of the testing procedures of the aforesaid molecules to determine the presence or absence of a substance. Hypothesis Without any available reagents, the demonstrations from the tests will help us understand how to determine the presence or absence of certain substances. Since the negative control will have a negative result for all test, most reagents that share the same characteristics should test the same.

Materials & Methods Materials: 0 Computer with Internet access to view video. Methods: CLC Watch video to preview the protein and starches tests 0 Watch video a second time to record the results 0 Document the tests for proteins and starches and answer questions from video Results Table 1: Protein Test Contents Results Negative/Positive did water blue negative milk solution pinkish purple positive 50% egg white purple positive 1% sucrose light blue negative 1. Did water 0 Expected to test negative for protein.

C] Did Water remained blue when Beirut was added, therefore tested negative for rotten C] The results were expected as did water is pure with no added chemicals 2. Milk Solution Expected to test positive C] The milk solution changed to a pinkish color when Beirut was added. Therefore, tested positive for protein 0 Due to the properties milk, a positive result was expected 3. Egg White CLC Expected to test negative positive for protein 0 test negative 4. 1% Sucrose Due to its deluded state, assumed that the egg white would 0 Expected to test positive 0 The 1% sucrose turned light blue when Beirut was added.

Therefore, tested active for protein 0 Due to the minimal amount of sucrose expected to test negative Table 2: Starch Test did water light yellow negative 1% starch solution light purposively onion Juice light yellow negative 1% sucrose light yellow negative 0 Expected to test negative for starch. 0 Did Water turned light yellow when iodine was added, therefore tested negative for protein The results were expected as did water is pure with no added chemicals 2. 1% Starch Solution 0 The 1% starch changed too light purple color when iodine was added.

Therefore, Estes positive for protein 0 Due to the properties of starch, a positive result was 3. Onion Juice 0 Expected to test negative 0 The onion Juice turned light yellow when iodine was added. Therefore, tested negative for protein 0 The 1% sucrose turned light yellow when iodine was added. Therefore, tested negative for protein Conclusion This lab help greatly in the understanding of the organic molecules of proteins and starches. I was able to understand the procedures, and testing of each reagent. In addition, I was able to understand that looking at substance it does not determine the outcome of the test.