DNA SCIENCE

He hypothesized that there is a "factor" that can change a harmless bacteria into a harmful one.

He discovered that the "transforming factor is the DNA.

He introduced the "Chargaff's rule," which is the basis of the base pairing of nucleotides.

They concluded that DNA is the genetic material present in bacteriophages.

They studied the structure of DNA using the X-ray diffraction technique.

They created the double-helix model of the DNA.