Which of the following bond is not present in $DNA$?
$\beta-1^{\prime}-9-N-g$ lycosidic bond
$3^{\prime}-5^{\prime}$ phosphodiester bond
$\beta-1^{\prime}-1- N - glycosidic$ bond
$\beta-1^{\prime}-2-N$-glycosidic bond
Diameter of each nucleosome is about
Length of $DNA$ in $E$. coli is
Genetic information is carried out by long chain molecule made up of
$X$ -ray diffration data produced by ........ and……..
Balbiani rings are sites of