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Biology, 10.12.2020 02:50 zstarr

In 1952, Rosalind Franklin took an X-ray photograph that revealed the structure of DNA. James Watson and Francis Crick followed up on this discovery in 1953. They discovered that the molecule has a specific shape that can best be described as — A. a single strand containing 4 different bases that vary depending on the type of DNA

B. ladder-shaped, containing 5 nitrogenous bases that bond to one another

C. triple-stranded, with bonds between each strand holding the three strands together

D. double-stranded and twisted, with bases bonded to other bases which hold the strands together

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