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Line 284: Three versions * In 1953, [[James Watson]] and [[Francis Crick]] contributed to one of the most important breakthroughs in biological science when they described the '''double helix structure''' of DNA. This helped to demonstrate how DNA serves as the hereditary code a….. (The one that reflected ~~yet another~~an error) * In 1953, [[James Watson]] and [[Francis Crick]] contributed to one of the most important breakthroughs in biological science when they described how the nucleotide "letters" in double helical DNA naturally form pairs. Nucleotide ''A'' always pairs with ''T'', and ''C'' always pairs with ''G''. (The current version)

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