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Anna Hefron- Story Board Extra Credit
Testo Storyboard
- Isn't that so interesting that enzyme macromolecules can increase the rate of a reaction without actually being consumed by it?!
- What?? What do you mean, how can it do that?
- Well, enzymes can be added to a reaction in which it acts as a catalyst, which simply refers to the enzymes ability to increase the rate of a reaction without actually being consumed by it. So, upon the addition of an enzyme, the activation energy needed to conduct the reaction is lowered while keeping the free-energy change the same as it would be without the enzyme.
- Wait so can any enzyme be added into a chemical reaction to give it more energy?
- Well, you see, enzymes do not add energy to a reaction, rather they lower the energy barrier required to carry out the reaction. So, the enzyme speeds up the reaction by lowering the amount of energy required to conduct the reaction, rather than adding energy to the reaction.
- Also, it is important to note that enzymes are very specific and selective in regard to the molecules it can react with due to its 3 dimensional shape, in which allows the enzyme to only act on specific molecules that complement the shape of the given enzyme, which are referred to the enzyme's substrates. Therefore, each enzyme can only catalyze one kind of reaction involving specific substrates due to the specificity of it so it may require multiple enzymes to speed up a given process that involves multiple different reactions due to the specificity of them.
- Oh okay I get that! So, enzymes that are a proper 'fit' for a given reaction can be added to increase the rate of reaction since it can lower amount of energy required to generate the reaction, right?
- Yes exactly!
- It is important to remember that enzymes typically follow the process of binding with the substrates of a given reaction to form the enzyme substrate complex which in turn generates the products of the given reaction as well as the enzyme which is exactly the same as it was at the start of the reaction, as it remains unchanged during this process. Therefore, enzymes lower the amount of energy required for a given reaction, to speed it up, while remaining unchanged throughout the process to generate products from the given reactants.
- Wow! Thank you so much for explaining this to me, it makes so much more sense now, I can't wait to learn more!
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