The most notable classes of biological macromolecules used in the fundamental processes of living organisms include:
* Proteins, which are the building blocks from which the structures of living organisms are constructed (this includes almost all enzymes, which catalyse organic chemical reactions).
* Amino acid, make up proteins, included the use in genetic code of life.
* Nucleic acids, which carry genetic information.
* Ribonucleic acid (RNA), production of proteins. 
* Deoxyribonucleic acid (DNA), nucleic acid in genetic form.
* Peptide, building block of proteins.
* Lipids, which also store energy, but in a more concentrated form, and which may be stored for extended periods in the bodies of animals.
* Phospholipid used in cell membrane.
* Carbohydrates, which store energy in a form that can be used by living cells.
* Lectin, for binding proteins. 
* Monosaccharide, simple sugars, including glucose and fructose.
* Disaccharides, sugar soluble in water, including lactose, maltose, and sucrose.
* Starch, made of amylose and amylopectin, plants energy storage.
* Glycogen, energy in animals.
* Cellulose, a biopolymer, found in the cell walls of plants.
* Fatty acid, two types, saturated fat and unsaturated fat (oil), are stored energy.
* Essential fatty acid, needed but not synthesized by the human body.
* Steroid, hormone, and used in cell membrane.
* Neurotransmitter, are signaling molecules.
* Cholesterol, used in the brain and spinal cord of animals.
* Wax, found in beeswax and lanolin. Plant wax used for protection.