The diagram below shows part of a DNA molecule. The length of a DNA double helix increases by 0.34 nm for every pair of nucleotides. The total number of nucleotides in a human body cell is 1.2 × 1010. Calculate the total length of double helix in a human body cell. Give your answer in metres. Use information from the diagram. – 7070

One thought on “The diagram below shows part of a DNA molecule. The length of a DNA double helix increases by 0.34 nm for every pair of nucleotides. The total number of nucleotides in a human body cell is 1.2 × 1010. Calculate the total length of double helix in a human body cell. Give your answer in metres. Use information from the diagram. – 7070”

1. Multiply 0.34 by 12,000,000,000 = 4,080,000,000
   Convert 4,080,000,000 nm to meters by dividing by 1,000,000,000 = 4.08 m
   Divide 4.08 m by 2 (because of base pairs) = 2.04 m

   Reply