Question

Consider the structures of casein and lactose Your manual states: "Casein is a phosphoprotein, meaning that phosphate groups are attached to the hydroxyl functions of some of the amino acid side-chains." Based on this sentence. provide the name and structure of at least two functional groups that must be present in a. casein b. Lactose is a disaccharide. Provide the name and structure of at least two functional groups that must be present in lactose. You must include the functional group that creates the linkage between the two sugar units. 2. Precipitation of casein is used in the production of foods like yogurt and cheese. Recall that you perform your precipitation on all the components of milk. For this reason, precipitation is achieved under very mild conditions, for instance by addition of a bacterial culture that ferments food carbohydrates into weak acids (e.g. lactic acid) that lower the pH of the medium. What functional groups in lactose In your lab, you will take melting points of both lactose and its octaacetate. Which of the two do you predict with have the higher melting point? Explain briefly.

Answer 1

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