What are 4 steps in Griffith's experiments?

Answer 1

S Strain ---> inject into mice ---> Mice Die

R Strain ---> inject into mice ---> Mice Live

Griffith was able to kill bacteria by heating them. He observed that heat-killed S Strain bacteria injected into mice did not kill them. When he

S Strain (heat Killed) ---> Injected into mice ---> Mice Live

S Strain ( heat Killed) + R Strain (Live) ---> Injected into mice ---> Mice Die

Answer 2

1. Injecting mice with non-pathogenic R strain of Streptococcus pneumoniae.
2. Injecting mice with heat-killed pathogenic S strain, causing no harm.
3. Injecting mice with a mixture of R and heat-killed S strain, resulting in mouse death.
4. Isolating live pathogenic S strain from the dead mouse, demonstrating transformation of R to pathogenic S strain.