[SidiousL]

No, she most certainly did not discover the DNA. The DNA (which was not named like that) had been around since Friedrich Miescher's work in the 19th century.

Your statement is at least[#] as ignorant as saying that J.J. Thompson discovered electricity since he discovered the electron. Of course, the electricity had been discovered long before that.

[#] What I have in mind here is that even the statement that she discovered the molecular structure of the DNA is not strictly speaking accurate.