Question

dna is a nucleic acid polymer composed of which repeating structural unit?
o nucleotides
o phosphate groups
o ribosomes
o proteins

Explanation:

DNA is a nucleic acid. Nucleic acids are polymers made up of repeating units called nucleotides. Each nucleotide consists of a nitrogen - containing base, a pentose sugar (deoxyribose in DNA), and a phosphate group. Phosphate groups are just one part of the nucleotide structure. Ribosomes are cellular structures involved in protein synthesis. Proteins are different macromolecules from nucleic acids, composed of amino acids.

Answer:

nucleotides