Histones are _____ charged

Histones are _____ charged

• A. Negatively
• B. Neutral
• C. Positively
• D. Variable

Answer: (C)

Histones are positively charged because they are basic proteins rich in amino acids like lysine and arginine. DNA has a negatively charged phosphate backbone, so the positive charges on histones allow strong electrostatic interactions that help DNA wind around the histone core to form nucleosomes and compact into chromatin. If histones carried negative or neutral charges, they wouldn’t bind DNA as effectively, hindering proper DNA packaging. While histone interactions can be modulated by modifications that change their charge, the fundamental property is their positive charge.

Histones are positively charged because they are basic proteins rich in amino acids like lysine and arginine. DNA has a negatively charged phosphate backbone, so the positive charges on histones allow strong electrostatic interactions that help DNA wind around the histone core to form nucleosomes and compact into chromatin. If histones carried negative or neutral charges, they wouldn’t bind DNA as effectively, hindering proper DNA packaging. While histone interactions can be modulated by modifications that change their charge, the fundamental property is their positive charge.