Question

If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of DNA double helix in haploid mammalian cell is $3.3\times {10}^9$ bp then length of DNA is approximately

• A. 1.12 m
• B. 1.36 m
• C. 1.18 m
• D. 1.56 m

Answer 1

The correct option is A 1.12 m

• Distance between two consecutive base pairs = 0.34 nm
  $=0.34\times {10}^{–9}$ m
• DNA length $=3.3\times {10}^9\times 0.34\times {10}^{–9}=1.12$ m.