The nitrogenous base which differentiates $DNA$ from $RNA$ is:

Given below are two statements:
Assertion $(A)$: Hydrolysis of $DNA$ does not form equal number of $A$ and $T$; $G$ and $C$.
Reason $(R)$: In $DNA$,adenine forms hydrogen bonds with thymine and cytosine forms hydrogen bonds with guanine.
The correct answer is:

What products would be formed when a nucleotide from $DNA$ containing thymine is hydrolysed?

Which of the following bases is bicyclic?

Which of the following is not a constituent of $RNA$?

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