Final answer:
Enzymes can accelerate reversible reactions in both the forward and reverse directions, but usually speed up the reaction more in the forward direction. This is because enzymes lower the activation energy of the forward reaction. In the reverse direction, the reaction may still occur, but at a slower rate.
Step-by-step explanation:
Enzymes can accelerate reversible reactions in both the forward and reverse directions. However, enzymes usually speed up the reaction in the forward direction more than in the reverse direction. This is because enzymes lower the activation energy required for the forward reaction, making it easier and faster for the reactants to form the products. In the reverse direction, the reaction may still occur, but it may proceed at a slower rate because the reverse reaction requires more energy.