Twisted double Helix

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    • #5947
      biochemical
      Participant

      Maybe this is a silly question, but I just wanna know, why DNA is formed in twisted double helix? Why not just straight like RNA? Thanks for helping. I find this forum has assisted me much in doing school tasks… 😀

    • #56358
      oppox
      Participant

      evolution, DNA is more stable that way then RNA. maybe its a more energetic conformation, the H-bonds between the bases forces it to adopt that structure. RNA is "always" single stranded so it doesnt have the pairing bases. Thats what I could come up with at the moment 🙂

    • #56395
      MrMistery
      Participant

      actually, DNA can be single stranded. there are some viruses that have single stranded DNA as genetic material: phiX174, phiM16 etc..
      DNA can even exist as a strange triple-stranded molecule, the triplex, or even as a tetraplex(if i remember correctly, this can happen if the DNA only consists of guanine bases)
      it is just that evolution has favoured the duble stranded B-form DNA over the others because of the increased stability confered by hydrogen bonding and the possibility of long length.

    • #56592
      lara
      Participant

      maybe to lodge histones and interact with other ions in the major and minor grooves and protect from nucleases.

    • #56638
      victor
      Participant

      Well….see this article..:D
      I think it will answer your question

      Uncovering DNA’s sweet secret[/url]

    • #56753
      fluktuacia
      Participant

      very interesting.. thx:)

    • #56763
      Amrik
      Participant

      i have read that..uncovering DNA’s sweet secret…it is very interesting!

    • #56822
      biochemical
      Participant

      Plenty of thanks, Friends… It absobloodylutey meet my question…

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