Calculate the length/diameter ratio for the extended E.coli DNA (4 Å between adjacent nucleotides). A) 4 × 10⁵ B) 1 × 10⁵ C) 3 × 10⁸ D) 3 × 10⁶

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Quizplus · Accepted Answer

The length of E.coli DNA is approximately 1.4 mm (or 1.4 × 10^7 Å). The diameter of DNA is about 20 Å. The length/diameter ratio is 1.4 × 10^7 Å / 20 Å = 7 × 10^5, which is closest to 4 × 10^5 when considering significant figures and typical approximations.

Calculate the Length/diameter Ratio for the Extended E