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DNA Structure Notes What Is DNA? • DNA is called the _________ of life. • It contains the _________ for building proteins. DNA is a nucleic acid made up of _________ joined together. DNA is made of three things: 1. A _________ base 2. A 5-carbon _________ called deoxyribose 3. A _________ group DNA has four types of nitrogen bases • Adenine • Guanine • Cytosine • Thymine The Shape of DNA • DNA is in the shape of a _________ _________ • It looks like a _________ _________ . • Between the strands are the _________ _________ . • _________ bonds hold the nitrogen bases together. • But only certain base pairs can _________ _________ . Nucleotide Base Pairs • _________ can only pair with Thymine • _________ can only pair with Cytosine • A with T • “Apple Tree” • C with G • “Chewing Gum” Examples
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