C1.1 Enzymes and metabolism Quiz
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5 questions, one answer each
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1. Which is a catabolic reaction?
- A. Glycogen formation
- B. Protein synthesis
- C. Digestion of starch
- D. Photosynthesis
2. In induced fit:
- A. Only the substrate changes shape
- B. Only the enzyme changes shape
- C. Both enzyme and substrate change shape
- D. Neither changes shape
3. Above the optimum temperature, enzyme activity falls because:
- A. Molecules move more slowly
- B. The enzyme is denatured
- C. Substrate runs out
- D. Activation energy increases
4. A reaction takes 50 s to reach its endpoint. The rate is:
- A. 0.02 s⁻¹
- B. 0.5 s⁻¹
- C. 5 s⁻¹
- D. 50 s⁻¹
5. Enzymes speed up reactions by:
- A. Increasing the energy released
- B. Lowering the activation energy
- C. Raising the temperature
- D. Increasing substrate concentration