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Heat killed S- cells alongwith live R- c...

Heat killed S- cells alongwith live R- cells of Diplococcus pneumoniae were injected in mice

A

Mice survived and had live S- cells

B

Mice survived and had dead R-cells

C

Mice died and showed live S- cells

D

Mice died and showed live R- cells.

Text Solution

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The correct Answer is:
D
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In an experiment done by Griffith it was found that when virulent capsulated smooth 'S' bacteria were injected into healthy mice, the mice dies of pneunomia. When mice were injected with non virulent 'R' forms of same bacteria, they survived and did not die to pneumonia. in another case when S-forms were killed by heating at above 60^(@)C and injected, rats did not get pneumonia, but when killed, s-forms and R-forms of bacteria were mixed and injected, the rats suffered from pneumonia and died. which one of the following conclusions can be drawn from the above experiment?

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