Question

which of the following units are repeatedly joined together to form a strand of dna?
polysaccharides
nucleotides
amino acids
fatty acids

Explanation:

DNA is a nucleic - acid polymer. Nucleotides are the monomers that are linked together to form nucleic acids. Polysaccharides are sugar polymers, amino acids form proteins, and fatty acids are part of lipids.

Answer:

B. nucleotides