I. What happens to macromolecules from food during digestion?
ii. What atoms make up sugar molecules, amino acids, and fatty acids?
iii. What do you notice about the atoms that make up these molecules?
iv. How are these atoms used to make new molecules? What types of molecules are made?
v. Where does the energy come from to produce these new molecules?

The large molecules necessary for life that are built from smaller organic molecules are called biological macromolecules. There are four major classes of biological macromolecules (carbohydrates, lipids, proteins, and nucleic acids), and each is an important component of the cell and performs a wide array of functions. Combined, these molecules make up the majority of a cell’s mass. Biological macromolecules are organic, meaning that they contain carbon. In addition, they may contain hydrogen, oxygen, nitrogen, phosphorus, sulfur, and additional minor elements.

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