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| Column-$I$ | Column-$II$ | Column-$III$ |
| $(1) \ 1952$ | $(a)$ Watson and Crick | $(i)$ Double helix model of $DNA$ |
| $(2) \ 1928$ | $(b)$ Friedrich Miescher | $(ii)$ Proof that $DNA$ is genetic material |
| $(3) \ 1869$ | $(c)$ Griffith | $(iii)$ Nuclein |
| $(4) \ 1953$ | $(d)$ Hershey and Chase | $(iv)$ Transforming principle |
| Column $I$ | Column $II$ |
| $1$. Ligase | $a$. Peptide bond formation |
| $2$. Ribozyme | $b$. Hydrolysis of lactose |
| $3$. Permease | $c$. Joining of Okazaki fragments |
| $4$. $\beta$-galactosidase | $d$. Increases permeability |
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