Q. Which among the following options demonstrate the transforming principle of Griffith?
A) S-strain → Injected into mice → Mice die
B) S-strain (heat killed)+ R strain (live) → Injected → Mice die
C) S-strain (live)+ R-strain (live) → Injected into mice → Mice die
D) R-strain → Injected into mice → Mice die
Explanation
Heat killed S-strain mixed with live R-strain when injected into mice, the animal died and thus, it proved that the heat killed S-strain transformed R-strain into virulent strain. Heat killed S-strain capacitated the R-strain to synthesize polysaccharide coat so as to acquire virulence.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.