Each of the following correctly describes an aspect of enzyme function EXCEPT:
- An enzyme will increase the rate at which a reaction will reach equilibrium by lowering the activation energy needed to convert reactants to products.
- Enyzmes function best in the presence of a large concentration of substrate and across a wide range of pH and temperature values.
- Those enzymes which work in the stomach function best at an acidic pH.
- If placed in a solution with no reactants but all products (of a simple one-step reaction mechanism) the enzyme will catalyze the reverse reaction and form reactants.
Here, choice (B) is false because it states that enzymes work best across a wide range of pH and temperatures. In fact, enzymes function best at very specific pH and temperature values. For most enzymes in the body, this is a neutral pH and 37ºC.
A, C, D: These are all accurate descriptions of enzyme function.