Answer AND Explanation:
The nucleotides can differ in a nucleic acid. The replacement of thymine with uracil forms an RNA.
Nucleotides are polymers that make up nucleic acids. Just like DNA, RNA is a polymer of nucleotides. Each of the nucleotides in DNA is made up of a nitrogenous base, a five-carbon sugar, and a phosphate group. DNA contains four the nitrogenous bases thymine, adenine, cytosine, and guanine.
