How do enzymes speed up chemical reactions? enzymes a) lower the activation energy of chemical reactions. b) raise the temperature of the cell, speeding chemical reactions. c) store atp, allowing more energy to be used in chemical reactions. d) act as miniature 'transfer trucks', gathering materials for chemical reactions, and placing them together.

The right answer is A) lower the activation energy of chemical reactions.

The enzyme accelerates the reaction without changing the steady state.

Enzymes lower the activation energy of the substrate.

Activation energy or free activation energy is the energy that must be absorbed by the reagents to break their bonds.

The reagents must reach an unstable transition state in which the bonds are more fragile and easier to break.

Even an exergonic reaction requires the absorption of energy to reach the transition state.

d. making up measurements to record.

c

explanation: