Class 12 NEET Biology Molecular Basis of Inheritance Questions Part 1

An octamer of 4 histones complexed with DNA forms nucleosome. The association of histones with DNA is very characteristic. It involves the formation of linear array of spherial structures called nucleosomes. These structures contains four pairs of histones (H2A,H2B,H3 and H4) in a ball; around which is wrapped a stretch of about 150 base pairs of DNA.