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3 Macromolecules and the Origin of Life. 3.1 What Kinds of Molecules Characterize Living Things?3.2 What Are the Chemical Structures and Functions of Proteins?3.3 What Are the Chemical Structures and Functions of Carbohydrates?3.4 What Are the Chemical Structures and Functions of Lipids?3.5 Wha
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1. Macromolecules and the Origin of Life