Question Detail
Question
In the transformation experiment to demonstrate that DNA is the hereditary material, mice were infected with
Correct Answer
Option D is the correct answer.
Detailed Explanation
In Griffith's experiment, he showed that something from heat-killed pathogenic (smooth) bacteria could transform live non-pathogenic (rough) bacteria into pathogenic ones. The key injection that killed the mice was the mixture of live rough (R) bacteria and heat-killed smooth (S) bacteria. The live R bacteria were transformed by genetic material from the dead S bacteria, becoming virulent S bacteria and killing the mouse.
Hint
Which mixture combined a harmless live strain with a deadly, but heat-killed, strain?