Answer:
Glucose
Step-by-step explanation:
A polymer is a macromolecule composed of many repeating subunits.
Triglycerides are made of three fatty acids and glycerol, they are polymers of fatty acid molecule monomers.
DNA molecules are polymers of nucleotides.
Glucose is a monomer. When it polymerizes it forms starch or cellulose.
Therefore, the only option that is not a polymer is glucose.