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Molecular Basis Of Inheritance

Question
CBSEENBI12047317
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A-DNA is

  • left-handed helix with 12 nucleotide pairs per turn

  • right-handed helix with 11 nucleotide pairs per turn

  • right handed helix with 12 nucleotide pairs per turn

  • left-handed helix with 11 nucleotide pairs per tum

Solution

B.

right-handed helix with 11 nucleotide pairs per turn

In A-DNA a single turn of right handed helix contains 11 base pairs which are tilted 20.2° away from perpendicular to helix axis, diameter is 23 Å and the axial rise or distance between successive base pairs is 2.56 Å.

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