Question

What is a nucleosome? Describe the components and structural features of a nucleosome with examples and drawings in detail. Why understanding nucleosome structure is important. Give clear discussions with facts and references. How can you use the understanding of nucleosome structure on plant genetics and breeding?

Answer 1

A nucleosome is the basic repeating unit of eukaryotic chromatin. In a human cell, about six feet of DNA must be packaged into a nucleus with a diameter less than a human hair. A single nucleosome consists of about 150 base pairs of DNA sequence wrapped around a core of histone proteins. The nucleosomes are arranged like beads on a string. They are repeatedly folded in on themselves to form a chromosome.