00:01
This question is about the experiment by griffith.
00:05
So the transforming principle by griffith.
00:13
So frederick griffith conducted the experiment with streptocococcus pneumonia and griffith culture, the pneumonia bacteria which showed two patterns of growth.
00:30
There were two strains, there was s and r strain.
00:34
So the s strain was virulent and the r strain was non -viruline.
00:42
So in his experiment he observed that when the mice was injected with s strain, the mice died.
00:56
The mice, when injected with r strain, the mice lived.
01:06
When the mice was injected with heat killed s strain, the mice lived.
01:21
When the mice was injected with heat killed s strain plus r bacteria leaving r strain, the mice died.
01:39
So he observed that something changed the r strain into a virulent one.
01:49
So he called that something the transforming principle.
01:56
So now let's look at the question.
01:57
Option a is that s -strain bacteria -dival pathotonic, which is right...