DNA

DNA, also known as deoxyribonucleic acid is genetic material that is found in almost all living organisms, it is usually located in the cell nucleus, and everyone's DNA is a little bit different. Nitrogen bases pair up with each other to form base pairs. When a lot of DNA are together, they make up a chromosome. ** 2.What does it look like (its structure) and what is it made from? **  The structure double helix looks like a spirally twisted ladder, where the base pairs look like rungs of the ladder, and deoxyribose sugar ad phosphate form the vertical lines, like a backbone. Both DNA and RNA are nucleic acids.
 * 1.What is DNA and where is it found? **

Adenine and Thymine always form hydrogen bonds, while Guanine and Cytosine form hydrogen bonds together.


** 3.How and why does it copy itself? **   DNA has the ability to copy itself and make an exact replica, this is called DNA replication. When DNA copies itself, each strand of it works as a template for duplicating the sequence. This process is extremely important wh en cell division occurs because the new cell has to have the exact same copy than the old one. media type="file" key="dna-rna2.swf" width="360" height="270" align="center"

http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/dna-rna2.swf The video below will help explain more about DNA replication ** 4.What are genes and where are genes found? **  Genes are part of larger sections called chromosomes. When we coil up DNA, it becomes a chromosome. They control the physical traits that we have such as how tall we grow, the color of our hair, and the color of our eyes, each gene has a particular job. Due to the fact that we inherit different genes, we look different.