100 Years of Science
D. Carrigan - Fermilab July 7, 2004
DNA, Darwin, and Dirt
The evolution of the geology of earth including impacts
and the atmosphere drives the environments
Survival of the Fittest for different environments explains evolution
DNA (~1953) Proteins have 20 amino acids. There are 4 bases in DNA (adenine[A], guanine[G], cytosine[C], thymine[T]). Combinations are AT (2 hydrogen bonds) and GC (three hydrogen bonds). The number of bits/base pair is 4.32/3= 1.44 bits/bp = ln_2(20)/3 where 3 is the number of base pairs in a codon (a triplet of base pairs). 600 Daltons for mass of a base pair with backbone and bonds. Human genome-3 billion DNA base pairs, actual information content is on the order of 0.05 Gbytes because of junk DNA. Point- lots of information per mass.