Nucleotides are the monomers of DNA and RNA and each nucleotide includes a phosphate group.
NOT BSTOTAL BS
NOT BS — Verdict: True
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The Short Version
Standard biochemical definitions support this statement. DNA and RNA are polymers made of nucleotide units, and a nucleotide is distinguished from a nucleoside by the presence of at least one phosphate group. The only minor nuance is that the number of phosphates varies by context, but that does not change the claim’s core accuracy.
Caveats
The number of phosphate groups can vary: free nucleotides may be mono-, di-, or triphosphates, while DNA/RNA strands contain nucleotide monophosphate residues.
Do not confuse nucleotides with nucleosides; nucleosides lack a phosphate group.
Some explanations blur the difference between synthesis precursors and the nucleotide units present in the final DNA or RNA polymer.