21. An enzyme and a reactant molecule maintain a relationship as
A. a temporary association
B. an association stabilized by a covalent bond
C. one in which the enzyme is changed permanently
D. non-complementary binding
22. An enzyme is assayed at an initial substrate concentration of 2 x 10-5M. In 6 minutes, half of the substrate is used. The Km for the substrate is 2 x 10-3M. The value of k in a minute is
A. 0.115
B. 0.42
C. 0.093
D. 6.693
23. The plot commonly used for determining the value of Vmax is
A. Lineweaver Burk plot
B. Langmuir plot
C. Eadie Hofstee plot
D. all of these
24. Quasi-steady state is also known as
A. Michaelis Menten approach
B. Briggs-Haldane approach
C. Pseudo steady state
D. all of the above
25. Which of these enzymes contains a Zinc (Zn) ion?
A. Carboxypeptidase A
B. Phosphorylase B kinase
C. Tyrosine hydroxylase
D. Phosphodiesterase