Olympiadane is a mechanically-interlocked molecule composed of five interlocking macrocyles that resembles the Olympic rings.

Ozone is a molecule composed of three atoms of oxygen.

Complex carbohydrates (polysaccharides) are defined as large molecules composed of chains of glucose units.

A polymer is a large molecule composed of repeating subunits bound together by covalent bonds.

Proteins are molecules composed of chains of amino acids.

The oxygen we need for life is O2 , a molecule composed of two atoms of oxygen.

An alkane is a molecule composed of the chemical elements hydrogen and carbon.

In other words, gasoline is made up of molecules composed of nothing but hydrogen and carbon arranged in chains.

In chemistry, a metallofullerene is a molecule composed of a metal atom trapped inside a fullerene cage.

Enzymes within lysosomes break down or digest particular nutrients, such as complex molecules composed of a sugar attached to a protein (glycoproteins).