Q. What would be the length of DNA double helix of mammalian cell if the distance between two consecutive base pairs is 0.34 nm?
A) 2.2 m
B) 34 m
C) 1.1 m
D) 5 m
Explanation
The haploid DNA content in mammals is [image:6_image82.wmf] bp. Thus, the diploid DNA content could be [image:6_image83.wmf] bp. The length of DNA double helix = Total no. of bp × Distance between bp = ([image:6_image84.wmf]) × ([image:6_image85.wmf]) bp = 2.2 m
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.