First slide

The DNA

Question

A given double stranded DNA molecule is 1,00,000 base pairs long. The length of this DNA molecule will be

Easy

A

10,000 nm
B

3.4 x 10⁴ nm
C

10⁴ millimicrons
D

2,00,000 nm

Solution

length of each base pair is 3.4 Angstroms. The length of DNA with 100000 base pairs is 3.4 X 100000 angstroms or 3.4 X 10000 nm. i.e. 3.4 X 10⁴ nanometers.

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