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Which enzyme breaks down starch into simpler carbohydrates during digestion?
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6. Enzymes and Enzyme Kinetics
Enzymes
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In enzyme-catalyzed reactions, what is the term for a substance that is changed by an enzyme?
A
Allosteric activator
B
Cofactor
C
Inhibitor
D
Substrate
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Understand the role of enzymes in biochemical reactions: enzymes catalyze reactions by binding to specific molecules and converting them into products.
Identify the term for the molecule that an enzyme acts upon and changes during the reaction. This molecule is the one that fits into the enzyme's active site.
Recall that an allosteric activator is a molecule that binds to a site other than the active site to increase enzyme activity, not the molecule being changed.
Recognize that a cofactor is a non-protein molecule or ion required for enzyme activity, but it is not changed by the enzyme.
Understand that an inhibitor is a molecule that decreases enzyme activity by binding to the enzyme, but it is not the molecule being transformed.
Conclude that the correct term for the substance changed by an enzyme is the substrate.
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