The length of DNA in a human cell is about

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2.3 m

2.4 m

2.2 m

2.0 m

answer is C.

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Detailed Solution

The distance between two consecutive base pairs = 0.34nm or 0.34 x 10^-9 m
If the length of DNA double helix in a typical mammalian cell = The total number of bp x Distance between two consecutive bp
= 6.6x 10⁹ bp x 0.34 x 10^-9 m/bp = 2.2 m.
The length of DNA in a human cell is about 2.2 m.

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