13. What monomer is represented by this diagram?
nitrogen base
phosphate
5-carbon sugar

Answer:
That is a nucleotide which is the monomer of a nucleic acid
Explanation:
The monomer shown here is a nucleotide.
Nucleotides are biomolecules that are composed of 5-carbon sugar (deoxyribose), a nitrogen base and a phosphate group.
Nucleotides are monomers that build up polynucleotides. A monomer is a substance that links to one another to form a larger molecule.
These polynucleotides are found in the DNA.
DNA is composed of many Nucleotides that are linked ogether hence DNA is a polynucleotide.
Hence, the monomer shown containing 5-carbon sugar , nitrogen base and a phosphate group is a nucleotide.
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