3 ms·
> What we know as the double helix, what everybody thinks of as DNA, is really a picture of sex (or "conception" if you want to get technical. That's why we hav
by kendallpark 12y ago
> What we know as the double helix, what everybody thinks of as DNA, is really a picture of sex (or "conception" if you want to get technical. That's why we have sex of course). DNA only occurs in that form during reproduction (could be cell, or organism reproduction of course, though during cell (asexual) reproduction it's only present for a few seconds at best, during sexual reproduction it exists for a few minutes)
??? What are you talking about? DNA exists in a double helical form almost always. An exception is when it is "unzipped" for transcription or duplication. (And that's only a few nucleotides at a time.)
I have no idea how you're relating sex to the double helical structure of DNA.
- waps 12y agoIn the chromatin network there's no double helix, because it's always mostly unrolled and various things are bound to it. It looks a lot more like a ladder. The double helix as analyzed only exists as part of chromosomes.
- kendallpark 12y agoIt seems you are mistaking DNA's quaternary structure for its tertiary structure. DNA's tertiary structure remains helical while wound up in chromatin. http://upload.wikimedia.org/wikipedia/commons/d/db/Nucleosome_1KX5_2.png http://upload.wikimedia.org/wikipedia/commons/d/db/Nucleosom... http://en.wikipedia.org/wiki/Nucleic_acid_structure http://en.wikipedia.org/wiki/Nucleic_acid_structure