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Molecular Basis of Inheritance question

2020 · Q48
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Molecular Basis of Inheritance question

2020 · Q48

NEETBiologyMolecular Basis of InheritanceMCQ+4 / −1
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 × 109 bp, then the length of the DNA is approximately
  1. A
    2.7 meters
  2. B
    2.0 meters
  3. C
    2.5 meters
  4. D
    2.2 meters
View written solutionFree

Correct answer: D

Length of DNA = [0.34 × 10–9] m × 6.6 × 109 bp = 2.2 m

Distance between 2 base pair in DNA helix = 0.34 nm = 0.34 × 10–9 m

Total number of base pair = 6.6 × 109 bp

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