Use the Following to Answer the Questions Below

question 20

Multiple Choice

Use the following to answer the questions below:
For each of the heterocyclic bases, choose a correct characterization from the response list. Responses may be used more than once or need not be used at all.

-Cytosine

• A)base found only in DNA
• B)base found only in RNA
• C)"single ring" base found in both DNA and RNA
• D)"double ring" base