In His Transformation Experiments,what Did Griffith Observe

Question

In his transformation experiments,what did Griffith observe?
A)Mutant mice were resistant to bacterial infections.
B)Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form.
C)Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic.
D)Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.
E)Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

Accepted Answer

Griffith observed that when he mixed a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain, some of the living cells were transformed into the pathogenic form. This was the first evidence of bacterial transformation, which led to the discovery of DNA as the genetic material.