Proteins are composed of amino acids, lipids consist of glycerol and fatty acids, and carbohydrates are composed of monosaccharides. the are biomolecules.
<h3>Classification and composition of biomolecules</h3>
Carbohydrates are biomolecules composed of one or more monosaccharide subunits linked by glycosidic bonds.
Lipids are biomolecules composed of one glycerol backbone and two or three fatty acids.
Proteins are biomolecules composed of amino acid subunits linked via peptide bonds.
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Answer:
The answer is Atom.
Explanation:
The atom is the smallest constituent unit of matter that has the properties of a chemical element and that it is not possible to divide by chemical processes. The atom is formed by a nucleus with protons and neutrons and several orbital electrons (subatomic particles); whose number varies according to the chemical element. Atoms combine to form molecules that then interact to form solids, liquids and gases.
It was used till the 1960s. Hope i helped.