In his transformation experiments, what phenomenon did Griffith (1928) observe?
A) Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form.
B) Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic.
C) Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.
D) Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

Question

Quizplus · 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 converted into the pathogenic form. This was known as the transformation phenomenon and provided evidence for the existence of genetic material that could be transferred between bacteria.

In His Transformation Experiments, What Phenomenon Did Griffith (1928) Observe