Match the following columns:

Column-$I$	Column-$II$
$(W)$ Griffith	$(1)$ $DNA$ is the genetic material
$(X)$ Avery,MacLeod	$(2)$ Semiconservative replication
$(Y)$ Meselson-Stahl	$(3)$ Transforming principle
$(Z)$ Hershey and Chase	$(4)$ Transformation inhibited by $DNase$

Match the columns.

Column-$I$	Column-$II$
$(a)$ Splicing	$(1)$ Lac Operon
$(b)$ Okazaki fragments	$(2)$ Lagging strands
$(c)$ Jacob and Monod	$(3)$ Lactose
$(d)$ Inducer	$(4)$ Removal of introns

Briefly describe the following:
$(a)$ Transcription
$(b)$ Polymorphism
$(c)$ Translation
$(d)$ Bioinformatics

$A$ mutant micro-organism unable to synthesize a compound required for its growth but able to grow if the compound is provided,is known as

What does $Y$ represent in the given figure?

Given below are two statements:
Statement $I$: Transfer $\text{RNAs}$ and ribosomal $\text{RNA}$ do not interact with $\text{mRNA}$.
Statement $II$: $\text{RNA}$ interference $\text{(RNAi)}$ takes place in all eukaryotic organisms as a method of cellular defence.
In the light of the above statements,choose the most appropriate answer from the options given below.