Question Detail
Question
Purines are made up of: a. cytosine and guanine b. adenine and guanine c. adenine and cytosine d. cytosine and uracil
Correct Answer
Option B is the correct answer.
Detailed Explanation
The purine bases are adenine and guanine. They are characterized by a two-ring structure. Cytosine, thymine, and uracil are pyrimidines (single-ring).
Hint
They are the 'bigger' bases with two rings.