Commonly confused

PFK-1 vs PFK-2

The tell

PFK-1 does glycolysis step 3. PFK-2 makes fructose-2,6-bisphosphate, the regulator that turns PFK-1 on.

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