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Download deoxyribonucleic acid contained in the chromosomes humans have
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Transcript
DNA: The Code of Life deoxyribonucleic acid contained in the chromosomes humans have 46, dogs78, mice40, some bacteriaonly one DNA gives the cells specific instructions to create protiens for the organism they belong to Sep 20 7:20 PM DNA is made up of 4 nitrogen bases Guanine (G), adenine(A), thymine(T), cytosine(C) these bases are arranged in 3 letter "words" which together form the gene "stories" NOTE: only certain bases will pair with others adenine ALWAYS pairs with thymine cytosine ALWAYS pairs with guanine Sep 20 7:49 PM 1 DNA Replication DNA can make a copy of it itself BECAUSE of the way the bases pair up 1) the DNA strand will 'unzip' as the chemical bonds are broken between each of the nitrogen bases 2) 'loose' nitrogen bases of the correct type will adhere to the free one 3) the ends of the newly attached nitrogen bases come together and the molecule is now a perfect copy of the DNA strand it originated from Sep 20 7:54 PM 2
