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.

Question

Quizplus · Accepted Answer

Enzymes work by lowering the activation energy needed for a reaction to occur, thus increasing the rate of the reaction. The three-dimensional structure or conformation of an enzyme is essential for its function, and any alterations may hinder its activity. Enzyme function is highly dependent on physical and chemical environmental factors, such as pH and temperature, which can affect the enzyme's shape and activity. Enzymes do not provide activation energy to substrates; they only facilitate reactions by lowering energy barriers.

Which of the Following Statements About Enzyme Function Is True