Biology question help!

Question

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 X 10^10. Calculate the total length of double helix in a human body cell. Give your answer in metres. ​

Answer 1

Hello Katrina, so it appear that they first give you the length of a nucleotide pair, they then provide you with the total number of nucleotides in a human body cell. They are asking you to calculate the length of DNA of a human body cell, so all you need to do is multiply the two numbers and then convert from nanometers to meters.

0.34 nm x 1.2 X 10^10 = Length of double helix in human body cell (then you convert from nm to meters)

Or

You can convert to meters at the beginning 3.4e-10m x 1.2 X 10^10 = Length of double helix in human body cell