In living organisms today, complex molecules like RNA and DNA are constructed with the help of enzymes. So how did these molecules form before life (and enzymes) existed? Why did some molecules end up ...
Extracted from: Nature (London, England), v. 171, no. 4356 (April 25, 1953). Names of Watson and co-author Sir Francis Crick at end of article. At head of title : Molecular structure of nucleic acids.
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