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16 Cards in this Set
- Front
- Back
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Characteristics of enzymes |
-speed up chemical reactions -substrate specific -affected by temperature, pH level, inhibitors -speeds up chemical reaction by lowering activation energy -every active site has its own specific shape and changes |
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What is exergonic |
A chemical that releases energy Ex; cellular respiration because it releases energy |
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What is endergonic |
Absorbs energy from the surroundings Ex; cellular respiration |
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Catabolic |
Molecules that are being broken down into separate molecules -release energy that is used to drive chemical reactions -substrate gets broken down Ex; cellular respiration |
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Anabolic |
Processes that build up molecules to form bonds and become a single molecule and/or store energy -reaction usually require energy -more than one substrate makes one product Ex; protein synthesis, photosynthesis |
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Denature |
Enzymes change shape permanently, so that substrate can not fit in anymore |
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What does a catalyst do ? |
-it speeds up a chemical reaction by reducing the amount of activation energy -less active energy needed |
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What Is an enzyme? |
Proteins that act as catalysts in a living organism or speeds up chemical reaction |
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Why do enzymes generally bind to only one type of substrate? |
Because it is substrate specific |
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How are lock&key similar to induced fit model |
The enzyme returns to its original shape after releasing the products and can be used again. -both substrate specific |
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How are l&k diff. To induced fit |
Shape of enzymes changes when the substrate attaches to active site |
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3 things that affect enzyme activity |
Temperature -high pH levels -acidic level cause protein structure of enzymes to denature Inhibitors, it slows down/stops the activity of an enzyme |
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Prosuct |
After each reaction when the substrate is no longer the same |
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Induced fit |
Active site will change to make substrate fit |
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What method does enzyme returns to its original shape after releasing the products and can be used again |
lock & key |
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pH level |
Below 7 is acidic Above 7 is basic/alkaline |
