Commonly confused

Cyclic electron flow vs Linear (noncyclic) flow

The tell

Cyclic loops ferredoxin back to cytochrome b₆f for extra ATP, with no NADPH and no O₂. Linear runs water to NADPH and releases O₂.

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