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:

The molecule shown is a monosaccharide (a simple sugar). Monosaccharides are the building blocks of carbohydrates. Proteins are built from amino acids, lipids have different structures (like fatty acids and glycerol), and nucleic acids are made of nucleotides.

Answer:

carbohydrate