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: -Condensing DNA into chromosomes prevents DNA tangling and damage during cell division.

Detailed explanation-3: -How is DNA packaged in a cell? The cells wrap their DNA around scaffolding proteins to form a condensed structure called chromatin.

Detailed explanation-4: -To package DNA inside the nucleus, cells wrap their DNA strands around scaffolding proteins to form a coiled condensed structure called chromatin. Chromatin is further folded into higher orders of structure that form the characteristic shape of chromosomes.

Detailed explanation-5: -The process starts when DNA is wrapped around special protein molecules called histones. The combined loop of DNA and protein is called a nucleosome. Next the nucleosomes are packaged into a thread, which is sometimes described as “beads on a string". The end result is a fiber known as chromatin.