Size Duel deck / The body, cells and particles
DNA double helix
Length: diameter of the helix
2 nm
This is the helix’s width; the DNA in one cell is far longer.
Sources and checks
Checked 2026-10-21: Researched by Codex (two independent publishers, verbatim quotes); every counted quote re-found on its page by the server check (content-verify); scope and plausibility reviewed by Claude (AI build agent). Quotes are short passages from each source.
“2 nanometers”National Human Genome Research Institute: source, retrieved 2026-10-21; quote re-found by the server check
“2 nm”OpenStax, Rice University: source, retrieved 2026-10-21; quote re-found by the server check
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