By using the diagram,select the correct option for $X$ and $Y$.

Write a comparative note on the properties of $DNA$ and $RNA$.

What is central dogma and describe the packing of $DNA$ helix?

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.

In which of the following is the flow of genetic information in the reverse direction?

Which of the following is not a correct statement regarding $\text{RNA}$?