from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The coiled structure of double-stranded DNA in which strands linked by hydrogen bonds form a spiral configuration, with the two strands oriented in opposite directions.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A metonym for DNA.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a pair of parallel helices intertwined about a common axis
Sorry, no etymologies found.
Not only can single units called nucleotides of DNA accidentally change when the DNA is copied in a new generation, but whole chunks of the double helix can accidentally either be duplicated or be left out.
The molecular chain known as actin forms in pairs that twist into a double helix as does DNA.
Perhaps most elegantly, the double helix immediately suggests a means of its self-copying, since each strand can be used as a template for the production of a new one.
I thought we had the double helix thing they taught us in high school science?
If you gradually heat DNA, there comes a point – somewhere around 85°C – when the bonding between the two strands of the double helix breaks, and the two helices separate.
Only having access to the two strands of DNA encoded in your body, and not even the full strands at that, because much of the coding on even the double helix has been turned off, makes you humans more likely to be ruled by the animal side of your natures.