2. Which macromolecules were present in your saliva and food choices? Explain why you think you got the results you did.
food choices: Bread and oil
Test indicators: Iodine, copper sulfate, and Sudan III
To determine which macromolecules are present in saliva and food choices, you can use specific test indicators to identify their presence. In this case, the test indicators mentioned are iodine, copper sulfate, and Sudan III.
Iodine is commonly used to test for the presence of starch, which is a polysaccharide. Copper sulfate can be used to detect the presence of proteins, while Sudan III is used to identify the presence of lipids or fats.
When it comes to saliva, it primarily consists of water, but it also contains amylase, an enzyme that helps break down starches. Therefore, when testing saliva using iodine, you may observe a slight color change indicating the presence of starch due to the amylase activity. However, the intensity of the color change might be weaker compared to starchy food.
In terms of food choices, bread is known to contain starch, a polysaccharide that can be detected using iodine. Therefore, when you test bread with iodine, you may observe a color change, turning the solution blue-black, confirming the presence of starch.
On the other hand, oil does not contain any significant amount of starch, proteins, or lipids that can react with the mentioned test indicators. Therefore, when testing oil with iodine, copper sulfate, or Sudan III, you would not observe any significant color changes, indicating the absence of starch, proteins, and lipids.
In summary, you might expect to find starch in both your saliva and the bread, as well as the absence of proteins and lipids in both cases. The lack of response from the test indicators when testing the oil suggests its minimal macromolecule content.