$RNA$ and $DNA$ are chiral molecules,their chirality is due to

$A$ gene is a segment of a molecule of

Hydrolysis of which of the following nucleic acids does not give an equal number of $A$ and $T$ or $G$ and $C$?
$(A)$ $m$-$RNA$
$(B)$ Single strand $DNA$
$(C)$ $r$-$RNA$
$(D)$ Double helix $DNA$

$DNA$ contains a base that is not present in $RNA$. Identify it.

In $DNA$,the base pairs are held together by which of the following?

Which of the following bases are present both in $DNA$ and $RNA$?