Which of the following is the wrong sequential order, when the S or the R strain of the bacterium is injected into the mice?(a) Mice -> S strain -> Dead(b) Mice -> R strain -> Alive(c) Mice -> Heat killed S strain -> Alive(d) Mice -> Heat killed S strain + live R strain -> AliveThe question was posed to me in quiz.This intriguing question originated from The Search for Genetic Material topic in section Molecular Basis of Inheritance of Biology – Class 12

Which of the following is the wrong sequential order, when the S or th

1.	Which of the following is the wrong sequential order, when the S or the R strain of the bacterium is injected into the mice?(a) Mice -> S strain -> Dead(b) Mice -> R strain -> Alive(c) Mice -> Heat killed S strain -> Alive(d) Mice -> Heat killed S strain + live R strain -> AliveThe question was posed to me in quiz.This intriguing question originated from The Search for Genetic Material topic in section Molecular Basis of Inheritance of Biology – Class 12
Answer» The correct answer is (d) MICE -> Heat killed S strain + live R strain -> Alive The explanation: When the heat killed S-strain of the bacterium is given along with the R strain to the mice, a PROCESS of transformation occurs. The heat killed S strain (avirulent) was able to TRANSFORM the R strain (avirulent) to BECOME a virulent strain. During this process of transformation, the heat killed S strained bacterium, transforms the R strain to produce the mucous(polysaccharide) and become virulent.

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