Hey its Mike and on Thursday we talked about DNA. DNA was a very hard topic and was very complex. So i am going to try to explain to you the structure of DNA. DNA is made up of nucleotides joined into long strands or chains by covalent bonds. As you can see on the right diagram DNA has nitrogen bases these are simply bases that contain nitrogen. DNA has four kinds of nitrogen bases these are adenine, guanine,cytosine,thymine. These are joined together by a covalent bond. That is the structure of DNA and it contains our genes and contains instructions to make proteins so it is very important in our lives.
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