ENZYMES LOWER the ACTIVATION ENERGY for reactions

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What is a "CATALYST"

-A catalyst is a molecule or substance that can LOWER the ACTIVATION energy of a reaction.

How do enzymes LOWER ACTIVATION ENERGY?

-An enzyme binds tightly to one or more molecules and holds them in a precise configuration that LOWERS the ACTIVATION ENERGY.

How does an "ENZYME" INCREASE the RATE of a reaction?

-An enzyme increases the rate of a reaction by LOWERING the ACTIVATION ENERGY barrier. *Enzymes can have enormous effects on the rate of reactions, speeding them up by as much as a factor of 10^14.

What is used to "BREAK COVALENT BONDS"?

-ENZYMES!!

What role do "ENZYMES" play in a given reaction?

-Enzymes lower the activation energy for reactions.

Facts about Enzymes:

-Enzymes tightly control the chemistry of living cells because they have the ability to LOWER the ACTIVATION barriers for specific reactions.

What is the definition of a "CATALYST"?

-It is a MOLECULE or SUBSTANCE that can LOWER the ACTIVATION ENERGY for a reaction.

Are enzymes changed by the reaction?

-NO! -The enzymes themselves are NOT changed by the reaction and CATALYZE the same reaction over and over again.

Are enzymes changed by the reaction?

-No!! -The enzymes themselves are NOT changed by the reaction and can CATALYZE the same reaction over and over again.

What are the molecules that enzymes act upon?

-Substrates

What are "Substrates"?

-They are MOLECULES that ENZYMES ACT UPON.


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