Question

who first identified dna?
rosalind franklin
erwin chargaff
friedrich miescher
james watson

Explanation:

Friedrich Miescher first identified DNA in 1869 while studying white blood cells. He isolated a substance from the nuclei of cells and called it "nuclein", which was later identified as DNA. Rosalind Franklin's work was on X - ray crystallography of DNA, Erwin Chargaff discovered Chargaff's rules, and James Watson, along with Francis Crick, proposed the double - helix structure of DNA.

Answer:

C. Friedrich Miescher