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

question 5

Multiple Choice

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.