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What is the length of the DNA double helix, if the total number of bp (base pair) is 6.6 x 10^9?

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in Biology – Class 12 by (271k points)
What is the length of the DNA double helix, if the total number of bp (base pair) is 6.6 x 10^9?

(a) 2.2 m/bp

(b) 2.5 m/bp

(c) 2.2 m

(d) 2.5 m

This question was addressed to me in a job interview.

The query is from Packaging of DNA Helix topic in division Molecular Basis of Inheritance of Biology – Class 12

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The correct answer is (c) 2.2 m

Easiest explanation: The distance between 2 consecutive bp is 0.34 nm. The formula to calculate the length of the DNA double helix:

The length of the DNA double helix = The total number of bp x distance between two consecutive bp.

As a result, we get 2.2 m as the length of the DNA double helix.

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