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 Can form 4 covalent bonds  Can form rings or long chains – allowing for complex structures

 Molecules with the same numbers of each atom (same chemical formula) but with a different structural arrangements

 Groups that are a part of different molecules that exhibit predictable properties  They are directly involved in chemical reactions

 Monomer is a small subunit that is joined to make a larger molecule the polymer  Monomers are the building blocks of polymers

 Dehydration reactions join monomers by removing water to make a polymer  Hydrolysis adds water to a polymer to break it down into monomers

 Carbohydrates  Proteins  Lipids (not all are considered polymers – i.e. steroids)  Nucleic Acids