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Structure of DNA

Complete turn...

Question

Complete turns in 45,000 bp DNA would be

A

45

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B

450

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C

4,500

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D

45,000

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Solution

The correct option is D 4,500
Since one complete turn of the double helix is 3.4 nm long and each of which has 10 base pairs, 45000 base pairs DNA will have 45000/10 = 4500 turns. Correct answer is option C.

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