heat-killed s strain bacteria+r strain when injected into mice, killed it. but how did it happen as s strain was already killed n r strain isn't enough to kill a mice??????
@Jankita:- Your friends are correct. The "transforming principle" given by Griffith revealed that the S strain bacteria had been killed. But the DNA had survived the heating process and was taken up by the R strain bacteria.
@ Prashant and Mercy:- Good job guys. Keep posting!