Adenosine is an example of which of the following?

The total number of hydrogen bonds in a $DNA$ double helix strand,where one strand has the following sequence of bases,is $...........$
$5^{\prime}-G-G-C-A-A-A-T-C-G-G-C-T-A-3^{\prime}$

What are the positions of $N$ atoms present in the purine ring of nucleic acids?

What type of sugar molecule is present in $DNA$?

$RNA$ is different from $DNA$ because $RNA$ contains

What is the total number of $-OH$ groups present in a nucleoside involved in the formation of $DNA$?