In Frederick Griffith's experiment, live R cells and dead S cells were injected into mice, causing fatal pneumonia. Neither live R cells nor dead S cells alone cause pneumonia, so Griffith concluded that _____

1.DNA is the genetic material
2.some, but not all, R cells cause pneumonia
3.DNA encoding the ability to form capsules was released from dead S cells and picked up by R cells
4.hereditary information of unknown identity transformed R cells into S cells
5.DNA controls the synthesis of specific products


4

Biology & Microbiology

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