I\'m only looking for the answer to #4 You are analyzing a sample of double-stra

Question

I'm only looking for the answer to #4


You are analyzing a sample of double-stranded DNA containing 84000 base pairs.

1. [2pt]
How many nucleotides are present in this molecule? Give your answer to the nearest whole number of nucleotides (e.g. 1024).
Correct, computer gets: 168000

2. [2pt]
What is the length of this molecule? Give your answer in nm to the nearest whole number (e.g. 1024; 1 nm = 10 Angstrom).
Correct, computer gets: 28560

3. [2pt]
How many complete turns of the double helix are in this molecule? Assume that the molecule is in the relaxed, B form. Give your answer in turns to the nearest whole number (e.g. 155).
Correct, computer gets: 8400

4. [2pt]
What is the ratio of length to width in this molecule? Give your answer to the nearest whole number reduced to a denominator of 1 (e.g. if the ratio is 200/20, answer 10).

Explanation / Answer

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B-form DNA has an average diameter of 2 nm.

so, the ratio length to width is:

28560 nm / 2 nm = 14280

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