Only 4 discussion questions

1. Based on experimental results from Part A, which types of carbohydrate molecules (sugars and/or starches) are present in each of the foods tested – egg, potato, and onion?

Although you must support each answer with experimental data, a complete explanation requires more than a simple statement of color changes that occurred. Your answer must explain the chemistry behind the tests used and the meaning of the test results. The background information in the lab manual and the pre-lab video will be important for this.

2. Name two other food items that you enjoy and that you would like to test for the presence of sugars and starches. Tell why you chose each item and hypothesize the results you believe you would observe for each food. This is NOT a question to be “googled”. Simply explain your thoughts and reasoning!

3. Suppose you have an unknown solution that you believe may contain lactose. Using reagents from this experiment, propose a procedure to follow to determine if the unknown solution contains lactose. Explain your reasoning completely.

4. Based on results from Part B Benedict’s and Iodine Tests (NOT the timed tests, only the data from the last two Results tables), does it seem that the saliva used in this experiment contains amylase that is active? How do you know? Support your answer with experimental data and explain your reasoning completely.

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