The length of E. coli DNA and length of DNA in a human 2N cell is:
(a) 1.36 mm and 2.2 m respectively (b) 1.36 mm and 2.2 mm respectively
(c) 1.3 ìm and 2.2 ìm respectively (d) 1.36 cm and 2.2 cm respectively
The length of DNA double helix in a typical mammalian cell is 2.2 metres.
It is calculated by multiplying the total number of bp with distance between two consecutive bp.
= 6.6 × 109 bp × 0.34 × 10^-9m/bp
= 2.2 metres.
In E.coli, the length of DNA is 1.36 mm.