Griffith's experiments, which showed 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) a factor from S strain was modifying the R strain bacteria.
B) DNA was definitely the transforming factor.
C) heat-killed S strain bacteria could be reactivated.
D) S strain bacteria are resistant to heat-killing.
E) R strain bacteria are resistant to heat-killing.

Question

Quizplus · Accepted Answer

Griffith's experiments revealed that a factor from the heat-killed S strain bacteria was able to transform the R strain bacteria, indicating that genetic material was being transferred between the bacteria. This provided early evidence of horizontal gene transfer and the role of DNA in genetic inheritance.

Griffith's Experiments, Which Showed the Transformation of R Strain Pneumococcus