Biology Forum › Molecular Biology › Twisted double Helix
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- October 10, 2006 at 5:48 pm #5947
biochemicalParticipantMaybe 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… 😀
- October 10, 2006 at 10:22 pm #56358oppoxParticipant
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 🙂
- October 11, 2006 at 6:04 pm #56395MrMisteryParticipant
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. - October 14, 2006 at 9:48 am #56592laraParticipant
maybe to lodge histones and interact with other ions in the major and minor grooves and protect from nucleases.
- October 15, 2006 at 3:27 am #56638victorParticipant
Well….see this article..:D
I think it will answer your question - October 16, 2006 at 1:20 pm #56753fluktuaciaParticipant
very interesting.. thx:)
- October 16, 2006 at 4:47 pm #56763AmrikParticipant
i have read that..uncovering DNA’s sweet secret…it is very interesting!
- October 17, 2006 at 3:04 pm #56822biochemicalParticipant
Plenty of thanks, Friends… It absobloodylutey meet my question…
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