Beyond the ladder-like structure described above, another key characteristic of double-stranded DNA is its unique three-dimensional shape. The first photographic evidence of this shape was ...

But James Watson and Francis Crick's claim was a valid one, for they had in fact discovered the structure of DNA, the chemical that encodes instructions for building and replicating almost all ...

Watson and Crick's discovery of DNA structure in 1953 revealed a possible ... Aware of previous studies that had relied on isotope labels as a way to differentiate between parental and progeny ...