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Question

Length of DNA segment having 200 nitrogen bases is _______.

A
680 A
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B
340 A
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C
68000 A
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D
68 μm
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Solution

The correct option is B 340 A
In 1 full turn of DNA with a length of 34A has 10 base pairs or 20 bases. Now length of a DNA segment having 200 bases is
34A10bp in ds DNA or 20 bases

x 200 bases in DNA 200×3420=340A

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