Question

If the length of E. coli DNA is 1.36 mm, can you calculate the number of base pairs in E.coli?
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Answer 1

Distance between two consecutive base pair = 0.34 nm

Total length of given DNA = 1.36mm  

∴ total no. of base pair =  1.36mm /0.34nm

⇒ 4 × 10⁶ Base pair.