In which of the following is a $2'-OH$ functional group present on every nucleotide?

Write a short note on the $RNA$ World.

In-vitro template-independent $RNA$ synthesis is a feature of

Select an incorrect statement regarding $\text{RNA}$ molecules.

How many polynucleotide chains is $RNA$ composed of?

Given below are two statements:
Statement $I$: Catalytic RNAs are called ribozymes.
Statement $II$: $RNA$ can undergo mutations,replicate,and catalyse reactions.
In the light of the above statements,select the correct option given below: