How can I effectively memorize complex biochemical pathways for my upcoming cumulative final exam?

I am a sophomore biology major currently struggling to retain the metabolic cycles required for my professor's closed-book final next week. I have already tried writing out the steps repeatedly and using standard flashcards, but I keep forgetting the specific enzymes involved in each transition. What active recall techniques or mnemonic strategies do you recommend for memorizing high-volume technical processes under tight time constraints?