$DNA$ is a polymer of

Select the correct option for histones.

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:

What does $t-RNA$ look like?

Which of the following is not found in $DNA$?

$DNA$ differs from $RNA$ because: