What is the chronological order of the important discoveries in the structure of DNA?
a. Franklin makes an X-ray diffraction photo of DNA -* Chargaff' s ratios of nucleotides -+
Watson and Crick identify the double helix
b. Franklin makes an X-ray diffraction photo of DNA - Watson and Crick identify the
double helix-> Chargaff' s ratios of nucleotides
c. Chargaff' s ratios of nucleotides -> Watson and Crick identify the double helix-> Franklin makes an X-ray diffraction photo of DNA
d. Chargaff's ratios of nucleotides -> Franklin makes an X-ray diffraction photo of DNA -> Watson and Crick identify the double helix
Answer: d. Chargaff's ratios of nucleotides -> Franklin makes an X-ray diffraction photo of DNA -> Watson and Crick identify the double helix