Enzymes can increase the rates of reactions over a miltion fold but they do not accomplish this by

a) Lowering the activation eneray of the reaction

b) Changing the equllbrium of the reaction

c) Highly specific binding of substrates

d) Stabilizing the transition state

e) Conformation changes accompanying catalysis

Changing the equilibrium of the reaction.

Explanation:

Enzymes are bio catalyst that can increase the rate of a bio chemical reaction up to million folds. Enzymes work at optimum conditions of temperature and pH.

The enzymes does not change the equilibrium of the reaction. The enzymes changes the forward and backward rate of a reaction at an equal rate and thus maintains the reaction equilibria.

Thus, the correct answer is option (b).