The four macromolecules are carbohydrates, proteins, lipids, and nucleic acids. They are polymers made of monosaccharides, amino acids, glycerol-fatty acids, and nucleotides.
Macromolecules are large complex structures that are composed of smaller units called monomers linked through various bonds and linkages.
Carbohydrates are energy sources made of monosaccharides that are simple six-carbon sugar. The proteins are involved in the cellular, metabolic and genetic activity and is made of amino acids linked by peptide bonds.
The lipids are the energy-storing molecules made of glycerol and fatty acid monomers. Similary nucleic acids like the RNA and DNA molecules are made of nucleotide backbone.
Therefore, the macromolecules are made of monomeric units.
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