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32 Cards in this Set
- Front
- Back
Which of these is exhibiting kinetic energy? |
A space station orbiting Earth |
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"Conservation of energy" refers to the fact that _____ |
Energy cannot be created or destroyed but can be converted from one form to another |
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Chemical energy is a form of _____ energy. |
Potential |
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In this reaction _____. |
The products have less potential energy than the reactants |
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In this reaction _____. |
Heat has been released to the environment |
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The following reaction A --> B + C + heatis a(n) _____ reaction. |
Exergonic |
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A(n) _____ reaction occurs spontaneously. |
Exergonic |
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Which of these reactions requires a net input of energy from its surroundings? |
Endergonic |
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In cells, what is usually the immediate source of energy for an endergonic reaction? |
ATP |
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The reaction ADP + P --> ATP is a(n) _____ reaction. |
Endergonic |
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The energy for an endergonic reaction comes from a(n) _____ reaction. |
Exergonic |
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What is the fate of the phosphate group that is removed when ATP is converted to ADP? |
It is acquired by a reactant in an endergonic reaction. |
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This graph illustrates a(n) _____ reaction. |
Endergonic |
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Select the INCORRECT association. |
Exergonic ... uphill |
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What is energy coupling? |
The use of energy released from an exergonic reaction to drive an endergonic reaction |
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Which of these is ATP? |
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What type of reaction breaks the bonds that join the phosphate groups in an ATP molecule? |
Hydrolysis |
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Rank these by reaction rate, as measured by the rate of product formation per unit time, from lowest reaction rate to highest reaction rate. To rank items as equivalent, overlap them. |
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Terms |
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In general, enzymes are what kinds of molecules? |
Proteins |
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Enzymes work by _____. |
Reducing Eª |
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An enzyme _____. |
Is an organic catalyst |
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What name is given to the reactants in an enzymatically catalyzed reaction? |
Substrate |
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As a result of its involvement in a reaction, an enzyme _____. |
Is unchanged |
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Energy of activation |
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Which of the following statements is most likely to be true in the case of the feedback-regulated enzymatic pathway shown? |
P4 binds E1 and deactivates it. |
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In which region does the reaction rate remain constant? |
Region C |
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In which region is the enzyme saturated with substrate? |
Region C |
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Consider a situation in which the enzyme is operating at optimum temperature and pH, and has been saturated with substrate. What is your best option for increasing the rate of the reaction? |
Increase the enzyme concentration. |
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Terms #02 |
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You have added an irreversible inhibitor to a sample of enzyme and substrate. At this point, the reaction has stopped completely. What can you do to regain the activity of the enzyme? |
The enzyme is inactive at this point. New enzyme must be added to regain enzyme activity. |
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You have an enzymatic reaction proceeding at the optimum pH and optimum temperature. You add a competitive inhibitor to the reaction and notice that the reaction slows down. What can you do to speed the reaction up again? |
Add more substrate; it will outcompete the inhibitor and increase the reaction rate. |