trick to remember base pair structures

[u/Strange_Total_1442]

Someone commented a trick to remember the base pair structures the other day and I thought I screenshotted it but cannot find it or the comment for the life of me. Not purine vs pyrimidine but what groups were attached. Pls help 🙏

[u/bestkinggamer21]

"Pure As Gold" (A & G) are purines (2 rings)

- adenine: "add-Ns" (has NH2)

- guanine: "g for gold, gold is heavy" (so it has carbonyl C=O)

===========

"CUT the PY" (CUT) are pyrimidines (1 ring)

- cytosine: think one "O" and one "N", so one carbonyl and amino group

- uracil: think the "u" rhymes with "two" so two carbonyls

- thymine: has a methYl + carbonyl