What is the approximate number of base pairs associated with a single nucleosome?: (A) 146, (B) 292, (C) 73, (D) 1460
Answer is A. Nucleosomes Fundamental unit of DNA organisation. It is Histones complexed to DNA. Two molecules of each of H2A, H2B, H3,and H4 (Core histones) forms a histone octamer. 1 and 3/4 turns (~146 bp) DNA double helix is wound around the histone octamer in a left-handed fashion.