# NEET Botany Molecular Basis of Inheritance Questions Solved

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.

(page-99)

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