Question

What is the length of human DNA containing $6.6\times 10^9$ bp?

• A. 22 nm
• B. 0.22 mm
• C. 2.2 m
• D. 22 m

Answer 1

Answer: (C)

The distance between 2 nucleotides/nitrogen bases is $0.34\times 10^{-9}m$ or $\mathrm{3.4.}\mathring{A}$ Therefore the length of human DNA containing $6.6\times 10^{9}bp$ would be
$=0.34\times 10^{-9}m\times 6.6\times 10^{9}bp$
$=2.244m$ or $2.2m$