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18 Cards in this Set
- Front
- Back
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The model stating that the enzyme changes its physical shape to conform to the physical characteristics of a specific substrate is called the
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Induced fit model
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Which of the following cell functions are mediated by ATP?
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Building of starch molecules from simple sugar molecules.
Passage of potassium across cell membranes Muscle movement Chromosome movement |
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Once an enzyme molecule catalyzes a reaction, it is broken down and its building bocks are recycled by the cell.
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False
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Specific locations on the surface of an enzyme molecule to which other molecules become attached prior to the chemical reaction are called
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Active sites
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What form of energy is defined as the movement of objects from a higher to lower entropy state?
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Kinetic
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Which of the following is an example of an endergonic reaction?
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An oak tree making new buds.
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The addition of the appropriate enzymes may cause a reaction to proceed at a faster pace than if no enzymes were added.
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True
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The ultimate source of energy for all living things is
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THE SUN
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The molecule to which an enzyme bonds prior to the chemical reaction is called a
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Substrate
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What two kinds of reactions are coupled during energy conversion in the cell?
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Endergonic and exergonic
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An exergonic reaction is one in which
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Energy is released during a chemical reaction.
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Molecules that attach themselves to active sites on the enzyme, thereby blocking the action of the enzyme are an example of
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Competitive inhibition
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What molecule functions as an intermediary in coupled reactions?
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ATP
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A series of linked chemical reactions in the cell that construct a product or products from a substrate or substrates is called
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A metabolic pathway
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The energy that must be added to cause molecules to react with one another, or to cause the molecules to react with one another at a faster rate is called
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Energy of activation
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Entropy is defined as
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The measure of randomness in a system.
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In a biological sense energy is defined as
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The capacity to do work
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In some cases enzymes need specific vitamins or ions in order to function optimally. These are called
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Cofactors
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