Question

choose the correct answer. purines and pyrimidines have different structures. what is the structure of pyrimidines? large, double - ring structures triangular, hollow structures small, single - ring structures

Explanation:

Pyrimidines are nitrogen - containing bases in nucleic acids and have small, single - ring structures. Purines have large, double - ring structures. The other option about triangular, hollow structures is incorrect.

Answer:

small, single - ring structures