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Answered 2008-09-26 09:14:13

The precise manner in which an enzyme lowers the activation energy of a reaction is not known, but current ideas are contained in the "induced-fit model" of enzyme action.

This model (or idea) suggests that when an enzyme and substrate (we'll consider a single substrate, but there may be more than one) interact to form an enzyme-substrate complex, the active site of the enzyme alters shape somewhat, and in so doing puts strain on bonds of the substrate molecule.

The resultant form of the substrate requires less energy than a free substrate molecule to reach the transition state, which is the form of the molecule at the peak of the graphical plot of free energy against time.

The chemical nature of the particular amino acids that form the boundaries of the active site is critical to the process, as the side-chains of these amino acids interact with the substrate.

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Does an enzyme lower the activation energy of a reaction?

The definition of enzyme is a macromolecule of protein that lowers the activation energy of a chemical reaction.


Difference between catalyzed and uncatalyzed reactions?

Catalyzed reaction has a lower activation energy because there is an enzyme present in the reaction. Uncatalyzed reaction has a higher activation energy because there is no enzyme present in the reaction.


What does an enzyme do to activation energy?

Enzymes generally lower the activation energy of a reaction, making them easier to take place.


How does an enzyme affect he activation energy of a reaction?

Enzymes lower the activation energy so the reaction can take place at a lower activation temperature/energy. -Im an AP/College Biology student. Trust me on this lol


What substance helps a chemical reaction?

A catalyst. Or, an enzyme can lower the activation energy of a chemical reaction.



Can an enzyme make an endothermic reaction exothermic?

Some enzymes can lower the activation energy of the reaction to that extent.


What happens to an enzyme during a biochemical reaction?

During a biochemical reaction, an enzyme binds with a substrate to lower the activation energy of the reaction. This results to an increase in the reaction rate.


What is the relationship between an enzyme and the activation energy of the reaction in which the enzyme participates?

Activation energy is the energy that must be provided to make a reaction take place. The enzyme helps speed up the reaction by lowering the activation energy making the reaction occur at a lower temperature than it would without an enzyme.So when a substrate binds to the active site of an enzyme, the shape of its molecule is lsighty changed. this makes it easier to change into a product. AS student.It lowers it.


How does an enzyme catalyze a chemical reaction in regards to activation energy?

Any catalyst will make a chemical reaction easier or quicker to happen by lowering the activation energy. On a energy diagram, you will see a lower "hill" for activation energy, which corresponds to less energy required to begin the reaction.



What affect rates does a enzyme catalyzed reaction have?

Enzymes increase the rate of reaction by changing the reaction mechanism to one with a lower activation energy.


How does an enzyme help a reaction occur?

All reaction, regardless of being exergonic, need energy to complete/go through the reaction. Enzymes lower that activation energy.


How does this enzyme work?

Enzymes lower the activation energy of a reaction to occur, allowing them to happen quicker and more frequently.


What role does an enzyme play in a biochemical reaction?

An enzyme is a catalyst, and it speeds up the biochemical reaction. It does this by providing an alternate pathway for the reaction to occur, and this alternate pathway has a lower activation energy than the pathway in the absence of the enzyme.


Which molecules lower the activation energy?

In biology, enzymes lower the activation energy required to start a reaction.


How much must an enzyme lower the activation energy of the reaction in order to achieve a increase in the reaction rate?

This question is too general.Enzymes work by lowering activation energies which, as a result, increase reaction rates.The amount of activation energy needed when a reaction is catalyzed is different for different reactions.


How does an enyzme operate?

An enzyme works by providing an alternate pathway for the reaction, and one that has a LOWER activation energy than the original pathway without the enzyme. It thus speeds up the reaction.


Biological catalysts or enzymes act by lowering what is required for an action?

Biological catalysts or enzyme lower the activation energy for a reaction.


When an enzyme binds with its substrate the activation energy needed for the chemical reaction to occur is increased True or False?

False, enzymes lower activation energies which allow the reaction to proceed at an increased rate.


What is the function of enzyme?

To lower the activation energy of reactions. A catalyst.


Do Enzyme decrease the amount of energy required to begin a reaction?

Yes, enzymes act as catalysts and lower the amount of activation energy needed for the chemical reaction. They provide a 'different pathway' to the reaction.


How do enzymes increase the rate of a reaction?

They increase the rate of reaction by providing an alternate pathway that has a lower energy of activation than the pathway taken in the absence of the enzyme.


What is activation energy and how do enzymes effect it?

Activation energy is the energy required to start a chemical reaction. Enzymes lower activation energy.


Is an enzyme used up by the reaction in catalyzes?

No. Enzymes are not used up in reactions, as with all catalysts. They lower the activation energy and speed up reaction rate.


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