Which one of the following statements regarding histone proteins is correct?

• Histones are a set of positively charged, basic proteins found in eukaryotic cell nuclei that package and order the DNA into structural units called nucleosomes.
• A protein acquires charge depending upon the abundance of amino acids residues with charged side chains.
• Histones are rich in the basic amino acid residues lysines and arginines. Both the amino acid residues carry positive charges in their side chains.
• Histones are organized to form a unit of eight molecules called Histone octamer.

​Extra Information :

• Deoxyribonucleic acid (DNA) and Ribonucleic acid (RNA) are the two types of nucleic acids found in living systems.
• DNA acts as the genetic material in most of the organisms.
• RNA though it also acts as genetic material in some viruses, mostly functions as a messenger.