Commonly confused

Pyruvate carboxylase vs PEP carboxykinase

The tell

Carboxylase adds CO₂ to pyruvate in the mitochondrion. Carboxykinase removes it from OAA in the cytosol.

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