In $DNA$,the base units are linked by which of the following?

Identify the nucleoside from the following:

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

Which nitrogen atom of a purine base is bonded with the furanose sugar to form a nucleoside?

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

The reason for the double helical structure of $DNA$ is the operation of