List and explain the steps of DNA packaging between having a

List and explain the steps of DNA packaging between having a linear piece of DNA and a condensed chromosome?

Solution

1. Short region of DNA double helix that is 2nm structure. In eukaryote DNA is present in the form of chromatin the basic unit of chromatin is nucleosome which is made up of Octamer of 2 unit each H2A,H2B,H3 and H4 around this 147bp of DNA wraped.

2. Beads on a string form of chromatin thhis is 11 nm structure here DNA wrap the histone protein.

3. 30nm of chromatin fiber of packed nucleosome here the linker histone link the different string and makes the structure more complex.

4. then 300nm structure which is a section of chrosome in extended form .

5. further the chromatin gets condensed with self interaction that is 700nm structure.

6. Finally metaphase chrosome that is 1400nm structure