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| Column $I$ | Column $II$ |
| $A$. Griffith | $i$. Lac operon |
| $B$. Jacob and Monod | $ii$. $DNA$ is the genetic material |
| $C$. Meselson and Stahl | $iii$. Transforming principle |
| $D$. Hershey and Chase | $iv$. $DNA$ replicates semiconservatively |
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