DNA and histones together form a beed like structure called:

Explanation

Mesosomes are a convoluted membranous structure formed in a prokaryotic cell by the invagination of the plasma membrane. They are involved in the synthesis of the cell membrane, replication of DNA, and protein synthesis. Therefore, A is incorrect. A polysome (AKA polyribosome) is a group of ribosomes bound to an mRNA molecule like "beads" on a "thread". It consists of a complex of an mRNA molecule and two or more ribosomes that act to translate mRNA instructions into polypeptides. Therefore, B is incorrect. A nucleosome is the basic structural unit of DNA packaging in eukaryotes. The structure of a nucleosome consists of a segment of DNA wound around eight histone proteins and has a bead-like structure. Therefore, C is the correct answer. A centrosome is a cellular structure involved in the process of cell division. Before cell division, the centrosome duplicates, and then, as division begins, the two centrosomes move to opposite ends of the cell. Therefore, D is incorrect.