Question

who discovered the structure of dna in 1953?
friedrich miescher
rosalind franklin
james watson and francis crick
oswald avery

Explanation:

• Friedrich Miescher discovered nucleic acid (not DNA structure).
• Rosalind Franklin contributed to DNA research (X - ray crystallography), but not the discovery of the structure.
• James Watson and Francis Crick are credited with discovering the double - helix structure of DNA in 1953.
• Oswald Avery showed DNA was the genetic material (not structure discovery).

Answer:

James Watson and Francis Crick