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2. How do the nitrogenous bases pair? ____ pairs with ____ ____ pairs with ____

3. If a strand of DNA has 20% C, what percent will be G? ________

4. If a strand of DNA has 35% A, what percent will be T? ________ 5. If a strand of DNA has 10% G, what percent will be T?

5. List three facts about the structure of DNA