Biology CLEP Prep Practice Exam

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Prepare for the Biology CLEP Test with comprehensive flashcards and multiple choice questions. Each question comes with explanations and hints to ensure a full understanding. Boost your exam readiness today!

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What chemical controls the amount of enzyme activity in a cell?

Ribonucleic acid
Inhibitors
Catalysts
Enzymes

The correct answer is: Inhibitors

Inhibitors are chemicals that decrease the activity of enzymes, while ribonucleic acid (RNA) is responsible for protein synthesis and not specifically for controlling enzyme activity. Catalysts are substances that increase the rate of a reaction, which is similar to enzymes but they are not specifically responsible for enzyme activity regulation within a cell. Enzymes are the proteins that catalyze specific biochemical reactions, but they do not control their own activity. Therefore, the best answer is inhibitors as they specifically decrease the activity of enzymes in a cell.