Question

the model shows the chemical structure of a molecule. this molecule is a building block of which type of biomolecule? carbohydrate protein lipid nucleic acid

Explanation:

Lipids are biomolecules that include fats, oils, and waxes. Fatty acids, like the molecule shown (with a carboxyl group at one end and a long hydrocarbon chain), are building blocks of lipids. Carbohydrates have a \(C:H:O\) ratio of \(1:2:1\) and are made of monosaccharides. Proteins are made of amino acids (which have an amino \(-NH_2\) and carboxyl \(-COOH\) group and a side chain). Nucleic acids are made of nucleotides (sugar - phosphate - nitrogenous base). The given structure matches a fatty acid (a lipid building block).

Answer:

lipid