Question

Which is the best definition of activation energy?
A. the energy required to end a chemical reaction
B. the energy required to bind a substrate to an active site
C. the energy required to break the bonds of reactant molecules
D. the energy required to re-form bonds in product molecules

Answer 1

Here is your answer:

The defination of activation energy from above information is (B).
》The energy required to bind a substrate to an active site.
(or)
》The energy requried to start a reaction.

Hope you understand..☆☆

Answer 2

The best definition of activation energy is given by option A.

• Activation energy is the energy required to start the chemical reaction or to start the process of conversion of product from the reactants in the forward direction.
• In this question activation energy is referred to in terms of the binding of enzyme and substrate for chemical processes inside the body.
• There is a particular site where the enzyme or reactant fits with the substrate to initiate the further reaction. This is called an active site.
• Only after it fits at the active site can the reaction occur and product formation takes place.
• However, orientation and correct conformation are necessary for enzymes or reactants to bind at the active site and it requires energy which is the activation energy.
• Hence, this energy binds the substrate to the active site.

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