The function of histone proteins in the nucleus is:

Which one of the following histones is not present in the core particle of the nucleosome?

Antiparallel strands of a $DNA$ molecule means that

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

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.

$A$ complete set of chromosomes inherited as a unit from one parent is known as