Provide long-term energy storage

Generally have same number of carbon atoms as H₂O units

Are composed of unique combinations of 20 amino acids

Are important for structure, protection, growth, and myriad functions

Help initiate and speed up chemical reactions

Provide primary fuel for all cellular machinery

Are greasy to the touch

Have a three-dimensional shape that determines function

Include sterol-based hormones that regulate growth & development

Form cell membranes

Are the chief building material of all organisms

Form much of the structure of cells

Do not dissolve in water

Are primary form of energy storage in plants and animals