Which of the following is True of enzymes?
A)Enzymes may require a nonprotein cofactor or ion for catalysis to take speed up more appreciably than if the enzymes act alone.
B)Enzyme function is increased if the three-dimensional structure or conformation of an enzyme is altered.
C)Enzyme function is independent of physical and chemical environmental factors such as pH and temperature.
D)Enzymes increase the rate of chemical reaction by lowering activation energy barriers.

Question

Quizplus · Accepted Answer

Enzymes work by lowering the activation energy required for a chemical reaction to occur, thus increasing the rate of the reaction. A is partially true, as enzymes can require nonprotein cofactors or ions for catalysis, but this does not necessarily lead to a greater increase in speed compared to if the enzyme acted alone. B is false, as the three-dimensional structure of an enzyme is essential for its function and changing it can often disrupt or impair the enzyme's activity. C is false, as enzyme function is highly dependent on environmental factors such as pH and temperature.

Which of the Following Is True of Enzymes