Which of the following statements accurately describes enzymes? a. enzymes slow chemical reactions. b. many different types of substrates with different shapes can bind to a single enzyme. c. temperature and ph can affect how enzymes work. d. enzymes increase the activation energy of reactions.

C. Temperature and pH can affect how enzymes work

Enzymes show a maximum activity at an optimum pH and temperature. Changes in the pH or the temperature can cause damage in the structure of the enzymes, if the structure changes the substrate can no longer bind to the enzyme, which is why the activity of the enzymes starts to slow down.