- 1(current)
Q. No.Which of the following statements regarding enzyme inhibition is correct?
| 1. | Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein |
| 2. | Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme |
| 3. | Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate |
| 4. | Non-competitive inhibitors often bind to the enzyme irreversibly |
Subtopic: Â Enzyme Inhibition: Introduction |
 80%
Level 1: 80%+
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In competitive inhibition:
| 1. | Inhibitor resembles the substrate in molecular structure |
| 2. | Competition between substrates and inhibitors to occupy active sites |
| 3. | Binding the inhibitors to active sites declines the enzyme action |
| 4. | All are correct |
Subtopic: Â Enzyme Inhibition: Introduction |Â Enzyme Inhibition |
 93%
Level 1: 80%+
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The inhibition of succinic dehydrogenase by malonate is an example of
1. competitive inhibition
2. non-competitive inhibition
3. allosteric modulation
4. none of the above
Subtopic: Â Enzyme Inhibition: Introduction |Â Enzyme Inhibition |
 93%
Level 1: 80%+
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The adjoining graph shows change in conc. of substrate on enzyme activity. Identify A, B and C:
|
A |
B |
C |
|
|
1. |
Ki |
Km |
Vmax |
|
2. |
Km |
Ki |
|
|
3. |
Vmax |
Km |
|
|
4. |
Km |
Vmax |
Subtopic: Â Enzyme Inhibition: Introduction |Â Enzyme Inhibition |
 88%
Level 1: 80%+
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Select the option which is not correct with respect to enzyme action.
| 1. | Substrate binds with enzyme as its active site |
| 2. | Addition of lot of succinate does not reverse the inhibition of succinic dehydogenase by malonate. |
| 3. | A non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate |
| 4. | Malonate is a competitive inhibitor of succinic dehydrogenase |
Subtopic: Â Enzyme Inhibition: Introduction |Â Enzyme Inhibition |
 68%
Level 2: 60%+
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- 1(current)
Q. No.
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