BOTANY

Detailed explanation-1: -Chromosomal DNA is packaged inside microscopic nuclei with the help of histones. These are positively-charged proteins that strongly adhere to negatively-charged DNA and form complexes called nucleosomes. Each nuclesome is composed of DNA wound 1.65 times around eight histone proteins.

Detailed explanation-2: -The octamer of histone proteins is wrapped with a DNA helix, giving rise to a structure called nucleosomes. The nucleosomes are further coiled, which results in the formation of chromatin fibres.

Detailed explanation-3: -The nucleosome is the fundamental subunit of chromatin. Each nucleosome is composed of a little less than two turns of DNA wrapped around a set of eight proteins called histones, which are known as a histone octamer. Each histone octamer is composed of two copies each of the histone proteins H2A, H2B, H3, and H4.

Detailed explanation-4: -(HIS-tone) A type of protein found in chromosomes. Histones bind to DNA, help give chromosomes their shape, and help control the activity of genes. Enlarge. Structure of DNA.

Detailed explanation-5: -Two turns of DNA wrap around 8 histone proteins from the nucleosome, this octamer of histone includes H2A, H2B, H3, and variants of histone. H1 histone protein acts as a linker protein between two nucleosomes binds to linker DNA.