Question

enzymes speed up reactions by lowering the activation energy. which letter on the diagram represents activation energy?

Explanation:

Activation energy is the energy barrier that reactants must overcome to start a chemical reaction. On an energy - reaction progress diagram, it is the difference in energy between the reactants (point A) and the transition state (the peak of the curve). In this diagram, the activation energy is represented by the vertical distance from the energy level of the reactants (A) to the highest point on the energy curve. So, the letter representing activation energy is B.

Answer:

B