Nitrogenous Bases PURINES: double ring of carbon and nitrogen atoms Adenine and Guanine PYRIMIDINES: single ring of carbon and nitrogen atoms Thymine and Cytosine Purines only pair with pyrimidines.
Nitrogenous Bases PURINES: double ring of carbon and nitrogen atoms Adenine and Guanine PYRIMIDINES: single ring of carbon and nitrogen atoms Thymine and Cytosine Purines only pair with pyrimidines.
notes_5-3.docx