M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:	A reaction occurs in a vessel but it is unclear to researchers whether the reaction is driven by enzymes or simply proceeds under ambient conditions. Which of the following provide the best evidence that the reaction is enzymatic?

When the vessel is heated to 85 °C, the reaction stops.

When the vessel is rapidly heated and then cooled back to its original temperature, the reaction no longer proceeds.

When one of the reactants is removed, the reaction stops.

When the pH is dropped, the reaction proceeds.