The DNA
Chapter Name : Molecular Basis Of Inheritance |
Sub Topic Code : 103_12_06_01_02 |
Topic Name : The DNA |
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Sub Topic Name : Packaging Of DNA Helix |
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Introduction
Here we get an introduction to how a single small nucleus of dimension 10-6 m contains a DNA polymer of 2.2 meters length.
Pre-Requisites:
Understand the structure of a DNA.
Real Life Question:
How does DNA control traits?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Nucleoid | Region where DNA is held with proteins. |
| Histones | Positively charged proteins. |
| Histone Octomer | Histones organized as a unit of 8 molecules. |
| Nucleosome | A structural unit of a eukaryotic chromosome, consisting of a length of DNA coiled around a core of histones. |
| Chromatin | Materials of which chromosomes are composed. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Encyclopedia | Read about the packaging of DNA. |
Places to visit :
Library
Practical examples around us
| Examples | Explainations |
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What you learn in Theory:
We learn that a DNA polymer is packaged into a cell with the help of certain proteins.