★ Enzymes and Movement of Substances Quiz
What are enzymes classified as?
A. Chemical inhibitors
B. Biological catalysts
C. Physical barriers
D. Energy sources
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What is a catalyst?
A. A substance that slows down a reaction and is used up.
B. A substance that increases the speed of a reaction and is used up.
C. A substance that increases the speed of a reaction without being changed or used up.
D. A substance that prevents a reaction from occurring.
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