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Q.

Which of the following types of bacteria were used in Griffith’s transformation experiment ?

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a

Diplococcus , R – III and S – II type

b

Pneumococcus, T2 phase

c

Streptococcus, R-II and S-III type

d

Diplococcus, E. coli

answer is C.

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Detailed Solution

Griffith used two strains of pneumococcus (Diplococcus pneumoniae) bacteria which infect mice – a type III-S (smooth) which was virulent, and a type II-R (rough) strain which was non virulent.

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