複選題29. Histones are found in eukaryotic cell nuclei that package and order the DNA into structural units called nucleosomes. They are usually rich in _______, and they interact with DNA via _______. (A) lysine and arginine; ionic bonds (B) glutamic acid and aspartic acid; hydrogen bonds (C) alanine and glycine; ionic bonds (D) lysine and arginine; hydrogen bonds (E) glutamic acid and aspartic acid; ionic bonds