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Home
‣
Biochemical Engineering
‣
Enzymes and Kinetics
Comments
Question
The initial velocity, V
0
, of an enzyme catalyzed reaction reaches V
max
as
Options
A. [S] = K
M
B. [S] = 10 * K
M
C. 1/[S] = 1/K
M
D. 1/[S] ? 0
Correct Answer
1/[S] ? 0
Enzymes and Kinetics problems
Search Results
1. The rate equation in non-competitive inhibition based on Michaelis Menten equation is given by
Options
A. r
max
S
/(
K
m
+
S
)(1+
I
/
K
i
)
B. r
max
E
/(
K
m
(1+
I
/
K
i
)+
S
))
C. V
max
S
/(
K
m
+
S
)(1+
I
/
K
i
)
D. r
max
S
/
K
m
Show Answer
Scratch Pad
Discuss
Correct Answer: r
max
S
/(
K
m
+
S
)(1+
I
/
K
i
)
2. A classical noncompetitive inhibitor has
Options
A. no effect on substrate binding
B. no effect on substrate binding and vice versa
C. significant effect on substrate binding
D. significant effect on substrate binding and vice versa
Show Answer
Scratch Pad
Discuss
Correct Answer: no effect on substrate binding and vice versa
3. When substrate [S] = K
M
(Michaelis-Menten constant), the velocity of an enzyme catalyzed reaction is about
Options
A. 0.1 * V
max
B. 0.2 * V
max
C. 0.5 * V
max
D. 0.9 * V
max
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.5 * V
max
4. Predominantly uncompetitive inhibition may be called when
Options
A. competitive inhibition is greater than uncompetitive inhibition
B. competitive inhibition is smaller than uncompetitive inhibition
C. competitive inhibition is equal to uncompetitive inhibition
D. none of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: competitive inhibition is greater than uncompetitive inhibition
5. Which category of enzymes belongs to class 5 in the international classification?
Options
A. Hydrolases
B. Isomerases
C. Oxido-reductases
D. Cyclase
Show Answer
Scratch Pad
Discuss
Correct Answer: Isomerases
6. The active site of an enzyme differs from an antibody-antigen binding site in that the enzyme active site
Options
A. contains modified amino acids
B. catalyzes a chemical reaction
C. is complementary to a specific ligand
D. contains amino acids without side chains
Show Answer
Scratch Pad
Discuss
Correct Answer: catalyzes a chemical reaction
7. Enzymes are basically
Options
A. proteins
B. vitamins
C. fat
D. carbohydrates
Show Answer
Scratch Pad
Discuss
Correct Answer: proteins
8. Classical noncompetitive inhibition is obtained only under
Options
A. slow equilibrium conditions
B. moderate equilibrium conditions
C. rapid equilibrium conditions
D. non-equilibrium conditions
Show Answer
Scratch Pad
Discuss
Correct Answer: rapid equilibrium conditions
9. Lock and key theory is based on the compatibility of
Options
A. enzyme and substrate
B. enzyme and product
C. enzyme and enzyme substrate complex
D. enzyme substrate complex and product
Show Answer
Scratch Pad
Discuss
Correct Answer: enzyme and substrate
10. Michaelis Menten equation can also be written as
Options
A. (-C
s
)/r = (C
s
/r
max
)+(K
m
/r
max
)
B. 1/r = (1/r
max
)+(K
m
/(r
max
.C
s
))
C. r = r
max
-(K
m
.r/C
s
)
D. All of these
Show Answer
Scratch Pad
Discuss
Correct Answer: All of these
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