Final answer:
Enzymes indeed increase the probability that reactants will turn into products by lowering the activation energy required for reactions, making them more efficient and speeding up the rate without changing the reaction's ΔG.
Step-by-step explanation:
It is true that enzymes increase the probability that any given reactant molecule will be converted to product. Enzymes are catalysts that accelerate chemical reactions in biological systems by lowering the activation energy required. They help to increase the rate at which chemical reactions occur without being consumed by the reaction itself. For example, enzymes can bind reactants in a specific way that facilitates the transformation into the product.
Enzymes achieve this by providing an alternate route for the reaction that requires less energy, and this makes the formation of products more efficient. They are not changing the thermodynamics of the reactions but making kinetic pathways more accessible. This means while the increase in ΔG (change in free energy) of reaction is not affected by enzymes, the rate at which the reaction proceeds is significantly enhanced.