A single human cell encloses about 1.5 metres of DNA,containing 4.5 billion base pairs.How far apart are these base pairs in the DNA?

Question

Quizplus · Accepted Answer

The distance between two adjacent base pairs in DNA is about 0.34 nanometers (nm). Therefore, the total length of DNA in a single human cell (1.5 meters or 1.5 x 10^9 nm) divided by the number of base pairs (4.5 billion or 4.5 x 10^9) gives a distance of approximately 0.34 nm between each base pair. Therefore, the correct choice is D) 0.34 nm.

A Single Human Cell Encloses About 1