Question

The purines in DNA are
A. thymine and cytosine
B. thymine and guanine
C. adenine and guanine
D. adenine and cytosine

Answer 1

this is a knowledge/memory-based question, you have had to read it somewhere.

I use mnemonic that I heard someone use before.. purines, sounds like "pure" which could be related to a precious metal, silver, with elemental symbol "Ag". So the purines are adenine and guanine.

Answer 2

Thank you! That helped a lot.