Quiz on enzyme is back with more questions and more clues. On average your score should be around 75%.

1. What is covalent catalysis?
   1. Formation of hydrogen bond between enzyme and substrate
   2. Formation of covalent bond between enzyme and substrate
   3. Formation of transient covalent bond between enzyme and substrate
   4. None of the above
2. How metal ions participate in catalysis?
   1. By causing reduction and oxidation reactions between enzyme and substrate
   2. By causing ionic interactions between enzyme and substrate
   3. All of the above
   4. None of the above
3. What is the common enhancing rate of enzymes?
   1. 105 to 1017
   2. 1012 to 1020
   3. 10-17 to 10-9
   4. None of the above
4. Enzyme chymotrypsin carries out which type of catalysis?
   1. Covalent catalysis
   2. General acid base catalysis
   3. None of the above
   4. Both a and b
5. What is enzyme kinetics?
   1. Studying the mechanism of rate of reaction of enzyme
   2. Factors affecting enzyme activity
   3. Both a and b
   4. None of the above
6. What is Vmax?
   1. Maximum rate of reaction
   2. Rate of reaction increase with increase in enzyme concentration
   3. Both a and b
   4. None of the above
7. In which year, Victor Henri proposed that the combination of an enzyme with its substrate molecule to form an ES complex is necessary?
   1. 1904
   2. 1903
   3. 1902
   4. 1901
8. Who gave the general theory of enzyme action in 1913?
   1. Leonor Michaelis and Maud Menten
   2. Alfred Michaelis
   3. Maud Michaelis
   4. Leonor Menten and Maud Michaelis
9. In an enzyme catalyzed reaction, enzyme exists in which form?
   1. Free form
   2. Combined form
   3. ES form
   4. All of the above
10. The initial period when ES concentration builds up in an enzyme catalyzed reaction is called?
    1. Steady state
    2. Initial period
    3. Pre steady state
    4. Ephemeral state
11. The state which occurs after pre-steady state is called?
    1. Pro-steady state
    2. Late pre steady state
    3. Post steady state
    4. Steady state
12. Who introduced the concept of steady state kinetics in 1925?
    1. G.E. Briggs and Haldane
    2. Michaelis and Menten
    3. Briggs
    4. Menten
13. What is Km in Michaelis-Menten equation?
    1. Michaelis-Menten constant
    2. Substrate
    3. Enzyme
    4. All of the above
14. The initial reaction rate reflects a steady state in which [ES] is constant. This is called?
    1. Michaelis and Menten state
    2. Steady state assumption
    3. Initial state assumption
    4. None of the above
15. Which enzymes are said to follow Michaelis-Menten kinetics?
    1. Enzymes which show parabolic dependence of rate of reaction and substrate
    2. Enzymes which show circular dependence of rate of reaction and substrate
    3. Enzymes which show hyperbolic dependence of rate of reaction and substrate
    4. None of the above
16. Double-reciprocal plot is also called?
    1. Michaelis plot
    2. Line plot
    3. Lineweaver-Burk plot
    4. Inverse plot
17. What is Kd?
    1. Dissociation constant
    2. Michaelis constant
    3. Lineweaver constant
    4. None of the above
18. What is the unit of Kcat?
    1. Reciprocal of concentration
    2. Reciprocal of time
    3. Both a and b
    4. None of the above
19. Km and Kcat of an enzyme reflects?
    1. Cellular environment
    2. Concentration of substrate normally encountered in vivo
    3. Reaction chemistry
    4. None of the above
20. What is the Km of substrate whose concentration in cell is high?
    1. Low
    2. High
    3. Depends on reaction
    4. Depends on parameters

ANSWERS:

1. 3
2. 3
3. 1
4. 3
5. 3
6. 1
7. 2
8. 1
9. 4
10. 3
11. 4
12. 1
13. 1
14. 2
15. 3
16. 3
17. 1
18. 2
19. 1, 2,3
20. 2

More enzyme quiz related articles, refer:

1) General Biochemistry

2) Quiz on Enzymes

3) Quiz on Enzymes 2

4) Quiz on Enzymes 4

5) Quiz on Enzyme Kinetics

6) Enzyme Quiz