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| Column $X$ | Column $Y$ |
| $(1)$ $DNA$ | $(P)$ Most abundant |
| $(2)$ $m-RNA$ | $(Q)$ Various types based on anticodons |
| $(3)$ $t-RNA$ | $(R)$ Carries information as genetic code |
| $(4)$ $r-RNA$ | $(S)$ $A$ specific part acts as a template |
| Column-$I$ | Column-$II$ |
| $i$. Avery,McCarty,and MacLeod | $a$. $DNA$ digested by DNAse inhibits transformation of $R$ cells to $S$ cells. |
| $ii$. Griffith | $b$. $DNA$ replication is semi-conservative. |
| $iii$. Hershey and Chase | $c$. Used Streptococcus pneumoniae. |
| $iv$. Meselson and Stahl | $d$. Used radioactive Sulphur and Phosphorus. |
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