nucleotides - Phosphate group, deoxyribose, nitrogen bases, Bases Names - Adenine, thymine, guanine, cytosine  , What type of bonds is in between the bases - hydrogen bonds , how many hydrogen bonds do adenine and thymine have - 2 hydrogen bonds, Backbone - phosphate and deoxyribose, phosphate and deoxyribose have - covalent bonds  , purines - adenine and guanine , pyrimidines - thymine and cytosine , base pairing rules - A-T, G-C, 5' end______ 3'______ - phosphate, -OH,

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