All LIVING things are mostly made of 4 types of molecules called BIOMOLECULES. BIOMOLECULES are very large molecules of many ATOMS covalently bonded together All BIOMOLECULES contain CARBON (C)
4 categories of BIOMOLECULES proteins carbohydrates lipids nucleic acids
ENERGY is stored in the COVALENT BONDS of these large molecules. When we eat, we get energy to live as chemical reactions within our bodies break these bonds. Our bodies can then use the parts of these large molecules to build new molecules that build our bodies.