Identify the pair of nucleotides in $DNA$ that are linked by three hydrogen bonds.

The common component in $DNA$ and $RNA$ is ......

In the structure of $DNA$,if one nitrogenous base is adenine,which nitrogenous base pairs with it?

What is a nucleosome?

Define and explain: Gene and Split gene.

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: