Who discovered DNA?
- AJames Watson and Francis Crick
- BGregor Mendel
- CJohannsen
- DHar Gobind Khorana
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (e) None of the above/More than one of the above
Explanation
DNA was discovered in 1869 by the Swiss chemist Friedrich Miescher, who found it in the nuclei of white blood cells and named it "nuclein".
Watson and Crick worked out its double-helix structure in 1953; they did not discover DNA. Since Miescher is not among the options, the answer is "None of the above".