The carriers of hereditary material are

How many hydrogen bonds are found between nitrogen bases in $DNA$ having $50$ nitrogen base pairs with $20$ thymine?

What is the reason for the anti-parallel nature of $DNA$ strands?

What are the structures called that give an appearance as 'beads-on-string' in the chromosomes when viewed under an electron microscope?

The supercoiled structure of the eukaryotic chromosome is explained by which model?

The amount of $DNA$ in the inactive region is ......