What analogy can you create that compares to the structure of all four major macromolecules?

Basically, macro molecules fall into four classes;

The lipids

The carbohydrates

The proteins

The nucleic acids

The fact that their role revolve around energy production by carbohydrates, energy storage and insulation by lipids, storage of genetic material by nucleic acids and structural support by proteins means this can be equated to the executive arm of the government that deals in provision of social amenity, protection, creation of job opportunities and sustaining a country's culture.