In eukaryotic chromosomes,the association of $DNA$ with histone and non-histone proteins was reported by . . . . . . in $1974$.

The $DNA$ wraps around the histone octamer at an angle of:

If the $DNA$ of $E. coli$ is $1.36 \ mm$ long,how many base pairs $(bp)$ does it contain?

In a bacterial chromosome,the genes are held together by which of the following?

How many polynucleotide strands are present in the structure of $RNA$ and $DNA$ respectively?

Given below are two statements:
Statement $I$: In prokaryotes,the positively charged $DNA$ is held with some negatively charged proteins in a region called nucleoid.
Statement $II$: In eukaryotes,the negatively charged $DNA$ is wrapped around the positively charged histone octamer to form nucleosome.
In the light of the above statements,choose the correct answer from the options given below: