Cytidine is a

Which of the following is a ribose (but not deoxyribose) nucleotide?

$DNA$ is displayed at the ....... level.

In the given equation,what does $A$ represent?

What is the main difference between a nucleoside and a nucleotide?

$P$: Nitrogen is essential for the synthesis of nucleic acids.
$Q$: Phosphorus is important in the structure of nucleic acids.