The carrier of genetic information is .......

Which one of the following is not applicable to $RNA$?

If the amount of $Adenine$ in $DNA$ is $20 \%$,what is the amount of $Guanine$ (in $\%$)?

Which of the following statements are correct with reference to the packaging of the $DNA$ helix?
$(A)$ Histones are organized to form a unit of eight molecules called a histone octamer.
$(B)$ Histones are negatively charged basic proteins.
$(C)$ Histones are rich in the basic amino acid residues - lysine and arginine.
$(D)$ The negatively charged $DNA$ is wrapped around the positively charged histone octamer to form a nucleosome.
$(E)$ The packaging of chromatin at higher levels requires an additional set of proteins called non-histone chromosomal proteins.

The mobile genetic element is

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