- The total length of DNA in a single human nucleus is approximately 1 meter because each human cell contains about 6 billion base pairs.
- When fully stretched, DNA is incredibly thin but long, measuring roughly 0.34 nanometers per base pair.
- Multiplying this by the number of base pairs results in a length close to 1 meter.
- This demonstrates how DNA is highly compacted within the nucleus through complex packaging mechanisms.

Reference: *Molecular Biology of the Cell*, 6th Edition, Alberts et al., Chapter 1, Page 20.