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Microcosm

DNA: size, dimension and comparison

The adopted reference is about 2 nm.

double-helix diameter

nm means nanometer: a unit used for molecules and tiny features in computer chips. Imagine 1 millimeter split into one million equal pieces: one piece measures 1 nm.

Two complementary strands carry genetic information.

Explore at this scale
DNA, interpreted illustration
Interpreted illustration · dimension stated in the fact sheet.

What does this number measure?

Two complementary strands carry genetic information. Displayed dimension: diameter of the double helix.

Compare the stated dimensions

The comparison uses the number in each fact sheet: altitude, height, diameter, length or distance, depending on the reference. Two values in metres do not necessarily describe the same property.

Source and limitations

Catalogue value to check against the source; not individually audited.

DNA: a double-helix fragment with two strands and base pairs. The dimension compares the helix's transverse diameter, not the fragment's length. Generated molecular model; bonds and sequence have not been validated.