Enzymes and Bioenergetics
Chapter 4
Exercises
1. In order to catalyse a reaction, an enzyme is required to
(a) be saturated with substrate
(b) decrease the activation energy
(c) increase the equilibrium constant
(d) increase the activation energy
2. Pepsin is a gastric enzyme. Does it have an acidic or alkaline optimum pH? What happens to pepsin when it enters the duodenum?
3. What is the relationship between vitamins and enzyme co-factors?
4. What is the effect of temperature, pH and substrate concentration on catalytic activity of enzyme?
5. The rate determining step of Michaelis-Menten kinetics is
(a) the complex dissociation of ES complex
(b) the complex formation
(c) the product formation
(d) the product degradation
6. Define Km and its significance.
7. What is meant by one unit of enzyme?
8. What is specific activity of an enzyme?
9. Briefly describe first and second laws of thermodynamics.
10. Define entropy. What is the relationship between free energy and entropy?
11. Why ATP is called universal energy currency?
Question Type By : Himashree Bora.
