Question

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

Explanation:

This molecule is a fatty - acid, which is a building block of lipids. Fatty - acids have a long hydrocarbon chain with a carboxyl group at one end, which is consistent with the structure shown. Carbohydrates have a different general structure with a ratio of carbon, hydrogen, and oxygen typically close to 1:2:1. Proteins are made up of amino acids with an amino group, a carboxyl group, and a variable R - group. Nucleic acids are composed of nucleotides.

Answer:

lipid