Carbohydrates perform a variety of functions in cells, including serving as a source of energy and forming part of the cells' structures. Carbohydrates with the same subunit composition can have distinct properties because of different arrangements of the atoms in the molecules.
■ Distinguish between structural isomers and stereoisomers.
■ What is the general name given to a single sugar?
■ How could you distinguish sucrose and lactose from protein by analyzing the elements in the molecules?
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