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QUESTIONS (DO NOT COPY ANSWERS OFF THE INTERNET) 1. (5 points) What are the products of hydrolysis from the following carbohydrates? Can any dehydrate to furfural? a. Starch b. Sucrose c. Lactose d. Glycogen Weeks 2 & 3 * Identification of Unknown Carbohydrates Post-lab Report 2. (2 points) What are glycoproteins and how would they respond to the Molisch or anthrone tests? 3. (1 point) Name the monosaccharide components of lactose. 4. (2 points) Do all carbohydrates react with H2SO4 at the same rate and produce the same colour with the colour-forming reagents? Explain briefly, including your own observations on the carbohydrates tested in this experiment. 5. (2 points) Give the name and structure of the functional group responsible for a positive Benedict's test in cyclic aldoses and ketoses (refer to your lecture notes). Aldoses Name: Structure: a. b. Ketoses Name: Structure: 6. (1 point) What is meant by the term reducing sugar? 7. (1 point) Cite examples from your tests that show that a negative Benedict's test is not always indicative of the absence of a sugar or other carbohydrate. 8. (1 point) Fructose is not an aldose, yet it is a reducing sugar. Explain. 9. (2 points) Is starch reducing? Is starch treated with amylase reducing? Explain. 10. (3 points) Compare Benedict's and Barfoed's solutions as follows: a. Chemical composition: i. Benedict's ii. Barfoed's b. Acidity or alkalinity: i. Benedict's ii. Barfoed's c. Relative rates of reaction with reducing sugar. i. Benedict's ii. Barfoed's