Final answer:
The bond that forms between nucleotides in DNA and RNA is a phosphodiester bond, which occurs between the phosphate group of one nucleotide and the five carbon sugar of another. This results in a 5'-3' phosphodiester linkage, which is part of the backbone structure of nucleic acids.
Step-by-step explanation:
A peptide bond is not the correct term when referring to the bond between nucleotides; the peptide bond occurs between amino acids in proteins. However, within the context of nucleotides and nucleic acids, the correct bond that forms between components of nucleotides is a phosphodiester bond. Specifically, this bond forms between the phosphate group of one nucleotide and the five carbon sugar of another nucleotide. More precisely, the phosphate residue is attached to the hydroxyl group of the 5' carbon of the sugar from one nucleotide and the hydroxyl group of the 3' carbon of the sugar from the next nucleotide, which results in a 5'-3' phosphodiester linkage. This linkage is a key part of the backbone structure of DNA and RNA, from which the nitrogenous bases protrude.