Griffith's Experiments Showing the Transformation of R Strain Pneumococcus Bacteria

question 112

Multiple Choice

Griffith's experiments showing the transformation of R strain pneumococcus bacteria to S strain pneumococcus bacteria in the presence of heat-killed S strain bacteria provided evidence that

• A) an external factor was affecting the R strain bacteria.
• B) DNA was definitely the transforming factor.
• C) S strain bacteria could be reactivated after heat killing.
• D) S strain bacteria required special genes to be pathogenic.
• E) All of the above

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