AP BIOLOGY

Detailed explanation-1: -In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Detailed explanation-2: -Figure 1: Chromosomes are composed of DNA tightly-wound around histones. 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.

Detailed explanation-3: -The DNA in eucaryotes is tightly bound to an equal mass of histones, which form a repeating array of DNA-protein particles called nucleosomes. The nucleosome is composed of an octameric core of histone proteins around which the DNA double helix is wrapped.

Detailed explanation-4: -A chromosome is a tightly wound coil of DNA. Chromosomes are found inside your cells. Such tight packing allows the DNA to fit inside a tiny cell. You have 23 pairs of chromosomes in each cell, different types, so that’s 46 per cell-a magic number!

Detailed explanation-5: -Each chromosome contains a molecule of DNA that is wound tightly around clusters of histone proteins. Individual DNA molecules are extremely long, consisting of millions of base pairs (matched nucleotides) each.