Jumping genes are now known as

In his experiments on the chemistry of $DNA$,Chargaff estimated the base composition of human sperms and found that Adenine constituted $31\%$ and Guanine $19\%$. The quantity of Cytosine in the $DNA$ of human somatic cell is likely to be (in $\%$)

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

Which amino acids are present in histones?

In $B-DNA$,the rise per base pair would be

The length of $DNA$ helix in a typical nucleosome is