6. Which of the following statements about enzyme function is true?
(A) Enzyme function is generally increased if the three-dimensional structure or
conformation of an enzyme is altered.
(B) Enzyme function is independent of physical and chemical environmental factors
such as pH and temperature.
(C) Enzymes increase the rate of chemical reactions by lowering activation energy
barriers.
(D) Enzymes increase the rate of chemical reactions by providing activation energy to
the substrate.