The central dogma of protein synthesis is
Watson and Crick are known for their discovery that $DNA$
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:
By using diagram, select the correct option for $X$ and $Y$
The element absent in $RNA$ is