Question

Andenine:guanine::purine:cytosin::thymin:??????

Answer 1

Answer:

The pyrimidines, cytosine and thymine are smaller structures with a single ring, while the purines, adenine and guanine, are larger and have a two-ring structure. E. The purines, adenine and cytosine, are large with two rings, while the pyrimidines, thymine and uracil, are small with one ring.

Explanation: