Watson and Crick proposed the model of $DNA$ structure in .......

Identify the correct features of $DNA$ from the following statements:
$(i)$ It is made of two polynucleotide chains.
(ii) The backbone is constituted by sugar and phosphate.
(iii) The two chains have anti-parallel polarity.
(iv) The bases in the two strands are linked through $H$-bonds.
$(v)$ Both chains are coiled in a right-handed fashion.

What types of nitrogenous bases are present in $DNA$ and $RNA$ respectively?

How does $DNA$ differ from $RNA$?

Which of the following features provide stability to the helical structure of $\text{DNA}$?

The telomeres of eukaryotic chromosomes consist of short sequences rich in: