Hydrogen Bonds and DNA
Why do lifeforms on Earth have double helix
Why not Triple helix or corkscrew shaped DNA?
This is an extremely deep question. It could be answered in a number of
different ways. Any of which would take considerable time if done
thoroughly. We scientists are still debating what the original genetic
molecule was on earth. From a perspective of energy, and conserving energy,
we know that stable molecules do not evolve from arrangements that use
energy the wrong way...much like friendships that take a lot of effort will
be less likely to endure. In the same respect our knowledge of the double
helix verses a triple helix is that, with the elements involved, the double
helix takes the least effort to remain stable.
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Update: June 2012