The complementary bases in $DNA$ are .......

Which components are present in a nucleotide?

$A$ nucleic acid,whether $DNA$ or $RNA$,gives on complete hydrolysis,two purine bases,two pyrimidine bases,a pentose sugar,and phosphoric acid. Nucleotides,which are intermediate products in the hydrolysis,contain:

In $DNA$, the consecutive deoxynucleotides are connected via

Assertion $(A)$: Adenine and guanine are present in $RNA$ as purine bases.
Reason $(R)$: The base uracil is present in $RNA$.
The correct option among the following is:

The number of oxygen atoms present in a nucleotide formed from a base that is present only in $RNA$ is ....