Which of the following contributes to the double helical structure of $DNA$?

What does a nucleotide contain?

Select the correct sequence of True $(T)$ and False $(F)$ statements from the following:
$(i)$ $\text{Pentose sugar} + \text{base} \rightarrow \text{Nucleotide}$
$(ii)$ $\text{Nucleotide} + \text{phosphate} \rightarrow \text{Nucleoside}$
$(iii)$ $DNA$ contains four bases $A$,$G$,$C$ and $T$
$(iv)$ $RNA$ contains four bases $A$,$G$,$C$ and $U$.

Which of the following is not present in a nucleotide?

Which of the following represents the simplified version of a nucleoside?

Adenosine is an example of which of the following?