Given the task definition, example input & output, solve the new input case.
Given a scientific question, generate a correct answer to it.
Example: Who proposed the theory of evolution by natural selection?
Output: darwin
This is a direct fact that Charles Darwin proposed the theory of evolution.

New input case for you: Enzymes, proteins, electron carriers, and pumps that play roles in glycolysis, the citric acid cycle, and the electron transport chain tend to catalyze reactions that are what?
Output:
non-reversible