1.
The hypothetical biochemical reaction A + B --> C + D requires 7.2 kcal/mole of energy to proceed. Could this reaction be coupled with the reaction ATP --> ADP + P (releases 7.2 kcal/mole of energy)? (level 2).
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2.
Cells probably regulate enzyme activity in all of the following ways except ... (level 2).
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3.
Which of the following is important in determining enzyme function? (level 2).
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4.
As biological catalysts, how do enzymes lower the activation energy of a reaction? (level 1)
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5.
The inhibitor of an enzyme is frequently a molecule that is produced at the end of a biochemical pathway in a cell. This inhibitor binds to the inhibitor site on an enzyme with several active sites, causing a change in the shape of the enzyme. This prevents the normal substrate from binding to all active sites. What process does this describe? (level 2)
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6.
According to the laws of thermodynamics, which of the following is NOT possible? (level 2)
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7.
Which statements about ATP are correct? ATP serves as a main energy shuttle inside cells. The reaction ATP --> ADP + P is coupled to endergonic reactions in cells. The reaction ATP --> ADP + P is an endergonic reaction. ATP drives endergonic reactions through the transfer of a phosphate group to another molecule. (level 2)
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8.
In any system, what is the term for energy that is not available for doing useful work? (level 1).
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9.
The hydrolysis of ATP is probably coupled to all of the following except ... (level 2).
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10.
According to the first and second laws of thermodynamics, if the entropy in the universe has increased, then what has happened? (level 2).
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11.
When energy changes from one form to another, some of the energy that can be used to do work is always lost. The loss of this energy is mostly in the form of ...(level 1).
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12.
Many types of "perpetual motion machines" have been invented; however, none of them have ever worked. An example of a simple perpetual motion machine might be as follows: a battery is hooked up to an electrical engine, causing the engine to turn a generator, which recharges the battery. In theory, the machine could be turned on, and it would run forever; however, in reality, it will not. Why? (level 2).
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13.
Which kind of work is exemplified by the contraction of skeletal muscles? (level 1).
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14.
Which statement concerning the following chemical reaction is NOT correct? ADP + P + energy --> ATP (level 2).
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15.
Which of the following is NOT an example of potential energy? (level 1).
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16.
Enzymes are critical to life. What is it that enzymes do that is so important? (level 1).
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17.
Some enzymes need assistance from other molecules (such as vitamins) in order to facilitate the transformation of chemical reactants into products. These other molecules are collectively referred to as ... (level 1).
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18.
Living things rely on a constant input of energy in order to sustain life. What is the ultimate source of energy for living things on Earth? (level 1).
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19.
What is activation energy? (level 1).
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20.
Which of the following statements concerning metabolic pathways is correct? (level 2).
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