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- Question
Which of the following refers to pseudo steady state?
Options- A. d(CE)/dt = 0
- B. d(Cp)/dt = 0
- C. d(CES)/dt = 0
- D. d(Cs)/dt = d(CES)/dt
- Correct Answer
- d(CES)/dt = 0
- 1. When [S] = 0.1 *KM, the velocity of an enzyme catalyzed reaction is about:
Options- A. 0.1 * Vmax
- B. 0.3 * Vmax
- C. 0.5 * Vmax
- D. 0.7 * Vmax Discuss
- 2. Most enzymes work by
Options- A. increasing energy of activation
- B. decreasing energy of activation
- C. not affecting energy of activation
- D. none of the above Discuss
- 3. Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?
Options- A. Chlorination
- B. Treating with potassium permagnate
- C. UV radiation
- D. Treating with bleaching powder Discuss
- 4. Calgon is used for removal of
Options- A. sodium carbonate
- B. permanent hardness of water
- C. potassium carbonate
- D. none of these Discuss
- 5. Temporary hardness of water is caused by the presence of
Options- A. chlorides of calcium and magnesium
- B. sulfates of calcium and magnesium
- C. bicarbonates of calcium and magnesium
- D. carbonates of sodium and potassium Discuss
- 6. In the steady state the material balance equation for any component of a system is
Options- A. rate of addition + rate of removal - rate of formation = 0
- B. rate of addition - rate of removal + rate of formation = 0
- C. rate of addition + rate of removal + rate of formation = 0
- D. none of the above Discuss
- 7. The equation for the rate of product formation for simple enzyme reaction is given by (Where rmax, maximum reaction rate, Cs substrate concentration, Cp product concentration ES, CES enzyme-substrate concentration)
Options- A. rp = rmax Cs/(Km+Cs)
- B. rp= rmax CES/(Km+ CES)
- C. rp = rmax Cs/(Km+CES)
- D. rp = rmax Cs/(Km+Cp) Discuss
- 8. Which of the following statement(s) regarding enzymes, is/are false?
Options- A. Enzymes are always proteins that function as catalysts
- B. Enzymes provide activation energy for reactions
- C. Enzyme activity can be regulated
- D. Enzymes may be used many times for a specific reaction Discuss
- 9. The slope of Lineweaver Burk plot for Michaelis Menten equation is
Options- A. Vmax/Km
- B. Km/Vmax
- C. 1/Km
- D. Km.Vmax Discuss
- 10. An enzyme has a Km of 4.7 x 10-5M. If the Vmax of the preparation is 22m moles liter-1 min-1, what velocity would be observed in the presence of 2.0 x 10-4M substrate and 5.0 x 10-5M of a competitive inhibitor?
Options- A. 13.54? moles liter-1min-1
- B. 6.68? moles liter-1min-1
- C. 7.57? moles liter-1min-1
- D. 17.8? moles liter-1min-1 Discuss
Enzymes and Kinetics problems
Search Results
Correct Answer: 0.1 * Vmax
Correct Answer: decreasing energy of activation
Correct Answer: UV radiation
Correct Answer: permanent hardness of water
Correct Answer: bicarbonates of calcium and magnesium
Correct Answer: rate of addition - rate of removal + rate of formation = 0
Correct Answer: rp = rmax Cs/(Km+Cs)
Correct Answer: Enzymes provide activation energy for reactions
Correct Answer: Km/Vmax
Correct Answer: 13.54? moles liter-1min-1
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