The difference between R and S strain of pneumococcus used by Griffith was

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R strain is virulent and S strain is avirulent.

R strain forms colonies on agar plates but not S strain

R strain lacks mucous coat and S strain has mucous coat.

R strain lacks cell wall and S strain has cell wall

answer is C.

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Detailed Solution

The difference between R and S strain of pneumococcus used by Griffith was R strain lacks mucous coat and S strain has mucous coat. R Strain was avirulent and S strain was virulent. R strain formed rough colonies and S formed smooth and shiny colonies on agar plates.

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