Experts please explain.....,,....

Dear student,
Please find below the answer:

The correct option is (1).
The distance between two consecutive base pairs= 0.34 nm
The total number of base pairs of DNA double helix in a typical mammalian cell - 3.3 x 109 bp.
The length of the DNA would be - Total no. of base pairs x distance between two consecutive base pairs.
So, Length= 3.3 x 109 x 0.34 x 10-9
                  = 1.12 m

Hope this information clears your doubt.
Regards.
 

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