Commonly confused

CPS-I vs CPS-II

The tell

CPS-I is mitochondrial and starts the urea cycle. CPS-II is cytosolic and starts pyrimidine synthesis.

Pairs like this are where exam points go missing — the concepts are fine, the labels swap. Retrieval fixes it faster than rereading: the daily quiz mixes confusable pairs into every set.

Today’s daily quiz All confusable pairs