Lesson Plans for High School Science Teachers


Deoxyribonucleic Acid – what a word! No wonder we shorten it. Found in every living cell, DNA is a long double spiral molecule made up of sugars and phosphates. The links are chemical bases of adenine, cytosine, guanine, and thymine. The order of these bases is the code for the cell’s activities and the lifespan of the entire organism.

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