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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn 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 activities sites declines the enzyme action
(4) All are correct
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe 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 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect 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
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology