- A Decreasing Vmax only
- B Increasing Km only
- C Decreasing both Km and Vmax
- D Increasing both Km and Vmax
Correct answer: B. Increasing Km only
Explanation: Competitive inhibitors compete with substrate for the active site. They increase apparent Km (lower affinity) but do not affect Vmax (can be overcome by excess substrate).
Concept context
Carbohydrates, proteins, lipids, nucleic acids, and enzyme kinetics. Essential foundation for understanding metabolism.