Macromolecules

Macromolecules are giant molecules that are formed by the joining of smaller molecules. (condensation reaction) Examples of macromolecules are polysaccharides, proteins, and nucleic acids. High concentrations of macromolecules in a solution can alter the rates and equilibrium constants of the reactions of other macromolecules, this effect is known as macromolecular crowding.
First type of macromolecule is the carbohydrate. A carbohydrate includes both sugars and polymers.
They are compounds made up of hydrogen,carbon and oxygen atoms which contains monosaccharides.
Lipids are made up of hydrogen and carbon atoms and are formed when a glycerol molecule combines with a fatty acid.
Proteins contain nitrogen, hydrogen, carbon, and oxygen atoms. They are polymers of amino acids.
Lastly, we have nucleic acids which are assembled from nucleotides. They contain oxygen, hydrogen, phosphorous, nitrogen, and carbon. Store and transport DNA and RNA.

source: http://bcs.whfreeman.com/thelifewire/content/chp03/0302002.html