Enzymes usually speed up the reaction by changing activation energy. The correct option is A.
What is activation energy?
In chemistry, activation energy is the minimum amount of energy to activate molecules or atoms to the point where they can cause chemical transformation or accessible and usable.
Heating is generally the source of activation energy, with reactant molecules absorbing thermal energy from their surroundings.
The activation energy is determined by the nature of the chemical transformation, not by the relative energy states of the reactants and products.
As the temperature rises, molecules will move and collide more frequently. Additionally, the molecules carry more kinetic energy.
As a result, as temperature rises, so does the proportion of collisions that can overcome the activation energy of the reaction.
Enzymes typically accelerate reactions by changing the activation energy.
Thus, the correct option is A.
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