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Molecular Basis of Inheritance
Structure of DNA – Dimensions
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Concepts tested
- length of the DNA in a mammalian cell
All Questions
2020 1 question
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If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs of a DNA double helix in a typical mammalian cell is $6.6\times10^9$ bp, then the length of the DNA is approximately:Length of DNA = number of base pairs × distance between consecutive base pairs $= 6.6 \times 10^9 \times 0.34 \times 10^{-9}$ m $\approx 2.2$ m