Question

how do enzymes affect the activation energy of a reaction? enzymes decrease the activation energy. enzymes increase the activation energy. enzymes do not affect the activation energy.

Explanation:

Enzymes are biological catalysts. They lower the activation - energy barrier required for a chemical reaction to occur, thus increasing the reaction rate without being consumed in the reaction. The graph also shows that the activation energy with enzyme is lower than without enzyme.

Answer:

Enzymes decrease the activation energy.