Chemical reactions are in principle reversible, but their equilibrium constants can be very large or very small.
Is this reaction readily reversible, or is the free energy change so negative that it is effectively irreversible under these conditions?
I'm not exactly sure how to ask this question, but - If reactions are reversible, why does biology often evolve different pathways for catabolism and anabolism?
A jacket is also reversible if it can be worn inside out. A car can go in reverse.