What are the main concepts that make up biochemistry and explain the relationships between them?

Biomolecules are all molecules that participate in the structure and functioning of living organisms, whether they are large polymeric molecules (macromolecules) such as polysaccharides, lipids, proteins, and nucleic acids or their monomers: monosaccharides, fatty acids, amino acids, and nucleotides, as well as their metabolic intermediates.
The chemical composition of the human body does not differ significantly from that found in other mammals, and in our case, the most abundant component is water (70%), followed by proteins (15%), fats (11%), minerals (3%) and carbohydrates (1%).
Carbohydrates, lipids, proteins, and nucleic acids are macromolecules formed by the chaining of monomers, united by characteristic bonds.